Commit | Line | Data |
---|---|---|
3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
31b8006e SW |
2 | |
3 | #include <linux/crc32c.h> | |
4 | #include <linux/ctype.h> | |
5 | #include <linux/highmem.h> | |
6 | #include <linux/inet.h> | |
7 | #include <linux/kthread.h> | |
8 | #include <linux/net.h> | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
31b8006e SW |
10 | #include <linux/socket.h> |
11 | #include <linux/string.h> | |
68b4476b YS |
12 | #include <linux/bio.h> |
13 | #include <linux/blkdev.h> | |
ee3b56f2 | 14 | #include <linux/dns_resolver.h> |
31b8006e SW |
15 | #include <net/tcp.h> |
16 | ||
3d14c5d2 YS |
17 | #include <linux/ceph/libceph.h> |
18 | #include <linux/ceph/messenger.h> | |
19 | #include <linux/ceph/decode.h> | |
20 | #include <linux/ceph/pagelist.h> | |
bc3b2d7f | 21 | #include <linux/export.h> |
31b8006e SW |
22 | |
23 | /* | |
24 | * Ceph uses the messenger to exchange ceph_msg messages with other | |
25 | * hosts in the system. The messenger provides ordered and reliable | |
26 | * delivery. We tolerate TCP disconnects by reconnecting (with | |
27 | * exponential backoff) in the case of a fault (disconnection, bad | |
28 | * crc, protocol error). Acks allow sent messages to be discarded by | |
29 | * the sender. | |
30 | */ | |
31 | ||
32 | /* static tag bytes (protocol control messages) */ | |
33 | static char tag_msg = CEPH_MSGR_TAG_MSG; | |
34 | static char tag_ack = CEPH_MSGR_TAG_ACK; | |
35 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; | |
36 | ||
a6a5349d SW |
37 | #ifdef CONFIG_LOCKDEP |
38 | static struct lock_class_key socket_class; | |
39 | #endif | |
40 | ||
31b8006e SW |
41 | |
42 | static void queue_con(struct ceph_connection *con); | |
43 | static void con_work(struct work_struct *); | |
44 | static void ceph_fault(struct ceph_connection *con); | |
45 | ||
31b8006e SW |
46 | /* |
47 | * nicely render a sockaddr as a string. | |
48 | */ | |
49 | #define MAX_ADDR_STR 20 | |
d06dbaf6 SW |
50 | #define MAX_ADDR_STR_LEN 60 |
51 | static char addr_str[MAX_ADDR_STR][MAX_ADDR_STR_LEN]; | |
31b8006e SW |
52 | static DEFINE_SPINLOCK(addr_str_lock); |
53 | static int last_addr_str; | |
54 | ||
3d14c5d2 | 55 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
31b8006e SW |
56 | { |
57 | int i; | |
58 | char *s; | |
59 | struct sockaddr_in *in4 = (void *)ss; | |
31b8006e SW |
60 | struct sockaddr_in6 *in6 = (void *)ss; |
61 | ||
62 | spin_lock(&addr_str_lock); | |
63 | i = last_addr_str++; | |
64 | if (last_addr_str == MAX_ADDR_STR) | |
65 | last_addr_str = 0; | |
66 | spin_unlock(&addr_str_lock); | |
67 | s = addr_str[i]; | |
68 | ||
69 | switch (ss->ss_family) { | |
70 | case AF_INET: | |
d06dbaf6 SW |
71 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%u", &in4->sin_addr, |
72 | (unsigned int)ntohs(in4->sin_port)); | |
31b8006e SW |
73 | break; |
74 | ||
75 | case AF_INET6: | |
d06dbaf6 SW |
76 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%u", &in6->sin6_addr, |
77 | (unsigned int)ntohs(in6->sin6_port)); | |
31b8006e SW |
78 | break; |
79 | ||
80 | default: | |
12a2f643 SW |
81 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %d)", |
82 | (int)ss->ss_family); | |
31b8006e SW |
83 | } |
84 | ||
85 | return s; | |
86 | } | |
3d14c5d2 | 87 | EXPORT_SYMBOL(ceph_pr_addr); |
31b8006e | 88 | |
63f2d211 SW |
89 | static void encode_my_addr(struct ceph_messenger *msgr) |
90 | { | |
91 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); | |
92 | ceph_encode_addr(&msgr->my_enc_addr); | |
93 | } | |
94 | ||
31b8006e SW |
95 | /* |
96 | * work queue for all reading and writing to/from the socket. | |
97 | */ | |
98 | struct workqueue_struct *ceph_msgr_wq; | |
99 | ||
3d14c5d2 | 100 | int ceph_msgr_init(void) |
31b8006e | 101 | { |
f363e45f | 102 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0); |
d96c9043 SW |
103 | if (!ceph_msgr_wq) { |
104 | pr_err("msgr_init failed to create workqueue\n"); | |
105 | return -ENOMEM; | |
31b8006e SW |
106 | } |
107 | return 0; | |
108 | } | |
3d14c5d2 | 109 | EXPORT_SYMBOL(ceph_msgr_init); |
31b8006e SW |
110 | |
111 | void ceph_msgr_exit(void) | |
112 | { | |
113 | destroy_workqueue(ceph_msgr_wq); | |
114 | } | |
3d14c5d2 | 115 | EXPORT_SYMBOL(ceph_msgr_exit); |
31b8006e | 116 | |
cd84db6e | 117 | void ceph_msgr_flush(void) |
a922d38f SW |
118 | { |
119 | flush_workqueue(ceph_msgr_wq); | |
120 | } | |
3d14c5d2 | 121 | EXPORT_SYMBOL(ceph_msgr_flush); |
a922d38f SW |
122 | |
123 | ||
31b8006e SW |
124 | /* |
125 | * socket callback functions | |
126 | */ | |
127 | ||
128 | /* data available on socket, or listen socket received a connect */ | |
129 | static void ceph_data_ready(struct sock *sk, int count_unused) | |
130 | { | |
131 | struct ceph_connection *con = | |
132 | (struct ceph_connection *)sk->sk_user_data; | |
133 | if (sk->sk_state != TCP_CLOSE_WAIT) { | |
134 | dout("ceph_data_ready on %p state = %lu, queueing work\n", | |
135 | con, con->state); | |
136 | queue_con(con); | |
137 | } | |
138 | } | |
139 | ||
140 | /* socket has buffer space for writing */ | |
141 | static void ceph_write_space(struct sock *sk) | |
142 | { | |
143 | struct ceph_connection *con = | |
144 | (struct ceph_connection *)sk->sk_user_data; | |
145 | ||
146 | /* only queue to workqueue if there is data we want to write. */ | |
147 | if (test_bit(WRITE_PENDING, &con->state)) { | |
148 | dout("ceph_write_space %p queueing write work\n", con); | |
149 | queue_con(con); | |
150 | } else { | |
151 | dout("ceph_write_space %p nothing to write\n", con); | |
152 | } | |
153 | ||
154 | /* since we have our own write_space, clear the SOCK_NOSPACE flag */ | |
155 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
156 | } | |
157 | ||
158 | /* socket's state has changed */ | |
159 | static void ceph_state_change(struct sock *sk) | |
160 | { | |
161 | struct ceph_connection *con = | |
162 | (struct ceph_connection *)sk->sk_user_data; | |
163 | ||
164 | dout("ceph_state_change %p state = %lu sk_state = %u\n", | |
165 | con, con->state, sk->sk_state); | |
166 | ||
167 | if (test_bit(CLOSED, &con->state)) | |
168 | return; | |
169 | ||
170 | switch (sk->sk_state) { | |
171 | case TCP_CLOSE: | |
172 | dout("ceph_state_change TCP_CLOSE\n"); | |
173 | case TCP_CLOSE_WAIT: | |
174 | dout("ceph_state_change TCP_CLOSE_WAIT\n"); | |
175 | if (test_and_set_bit(SOCK_CLOSED, &con->state) == 0) { | |
176 | if (test_bit(CONNECTING, &con->state)) | |
177 | con->error_msg = "connection failed"; | |
178 | else | |
179 | con->error_msg = "socket closed"; | |
180 | queue_con(con); | |
181 | } | |
182 | break; | |
183 | case TCP_ESTABLISHED: | |
184 | dout("ceph_state_change TCP_ESTABLISHED\n"); | |
185 | queue_con(con); | |
186 | break; | |
187 | } | |
188 | } | |
189 | ||
190 | /* | |
191 | * set up socket callbacks | |
192 | */ | |
193 | static void set_sock_callbacks(struct socket *sock, | |
194 | struct ceph_connection *con) | |
195 | { | |
196 | struct sock *sk = sock->sk; | |
197 | sk->sk_user_data = (void *)con; | |
198 | sk->sk_data_ready = ceph_data_ready; | |
199 | sk->sk_write_space = ceph_write_space; | |
200 | sk->sk_state_change = ceph_state_change; | |
201 | } | |
202 | ||
203 | ||
204 | /* | |
205 | * socket helpers | |
206 | */ | |
207 | ||
208 | /* | |
209 | * initiate connection to a remote socket. | |
210 | */ | |
211 | static struct socket *ceph_tcp_connect(struct ceph_connection *con) | |
212 | { | |
f91d3471 | 213 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
31b8006e SW |
214 | struct socket *sock; |
215 | int ret; | |
216 | ||
217 | BUG_ON(con->sock); | |
f91d3471 SW |
218 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
219 | IPPROTO_TCP, &sock); | |
31b8006e SW |
220 | if (ret) |
221 | return ERR_PTR(ret); | |
222 | con->sock = sock; | |
223 | sock->sk->sk_allocation = GFP_NOFS; | |
224 | ||
a6a5349d SW |
225 | #ifdef CONFIG_LOCKDEP |
226 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); | |
227 | #endif | |
228 | ||
31b8006e SW |
229 | set_sock_callbacks(sock, con); |
230 | ||
3d14c5d2 | 231 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 232 | |
f91d3471 SW |
233 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
234 | O_NONBLOCK); | |
31b8006e SW |
235 | if (ret == -EINPROGRESS) { |
236 | dout("connect %s EINPROGRESS sk_state = %u\n", | |
3d14c5d2 | 237 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
238 | sock->sk->sk_state); |
239 | ret = 0; | |
240 | } | |
241 | if (ret < 0) { | |
242 | pr_err("connect %s error %d\n", | |
3d14c5d2 | 243 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
31b8006e SW |
244 | sock_release(sock); |
245 | con->sock = NULL; | |
246 | con->error_msg = "connect error"; | |
247 | } | |
248 | ||
249 | if (ret < 0) | |
250 | return ERR_PTR(ret); | |
251 | return sock; | |
252 | } | |
253 | ||
254 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) | |
255 | { | |
256 | struct kvec iov = {buf, len}; | |
257 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
98bdb0aa | 258 | int r; |
31b8006e | 259 | |
98bdb0aa SW |
260 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
261 | if (r == -EAGAIN) | |
262 | r = 0; | |
263 | return r; | |
31b8006e SW |
264 | } |
265 | ||
266 | /* | |
267 | * write something. @more is true if caller will be sending more data | |
268 | * shortly. | |
269 | */ | |
270 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, | |
271 | size_t kvlen, size_t len, int more) | |
272 | { | |
273 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; | |
42961d23 | 274 | int r; |
31b8006e SW |
275 | |
276 | if (more) | |
277 | msg.msg_flags |= MSG_MORE; | |
278 | else | |
279 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ | |
280 | ||
42961d23 SW |
281 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
282 | if (r == -EAGAIN) | |
283 | r = 0; | |
284 | return r; | |
31b8006e SW |
285 | } |
286 | ||
287 | ||
288 | /* | |
289 | * Shutdown/close the socket for the given connection. | |
290 | */ | |
291 | static int con_close_socket(struct ceph_connection *con) | |
292 | { | |
293 | int rc; | |
294 | ||
295 | dout("con_close_socket on %p sock %p\n", con, con->sock); | |
296 | if (!con->sock) | |
297 | return 0; | |
298 | set_bit(SOCK_CLOSED, &con->state); | |
299 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); | |
300 | sock_release(con->sock); | |
301 | con->sock = NULL; | |
302 | clear_bit(SOCK_CLOSED, &con->state); | |
303 | return rc; | |
304 | } | |
305 | ||
306 | /* | |
307 | * Reset a connection. Discard all incoming and outgoing messages | |
308 | * and clear *_seq state. | |
309 | */ | |
310 | static void ceph_msg_remove(struct ceph_msg *msg) | |
311 | { | |
312 | list_del_init(&msg->list_head); | |
313 | ceph_msg_put(msg); | |
314 | } | |
315 | static void ceph_msg_remove_list(struct list_head *head) | |
316 | { | |
317 | while (!list_empty(head)) { | |
318 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, | |
319 | list_head); | |
320 | ceph_msg_remove(msg); | |
321 | } | |
322 | } | |
323 | ||
324 | static void reset_connection(struct ceph_connection *con) | |
325 | { | |
326 | /* reset connection, out_queue, msg_ and connect_seq */ | |
327 | /* discard existing out_queue and msg_seq */ | |
31b8006e SW |
328 | ceph_msg_remove_list(&con->out_queue); |
329 | ceph_msg_remove_list(&con->out_sent); | |
330 | ||
cf3e5c40 SW |
331 | if (con->in_msg) { |
332 | ceph_msg_put(con->in_msg); | |
333 | con->in_msg = NULL; | |
334 | } | |
335 | ||
31b8006e SW |
336 | con->connect_seq = 0; |
337 | con->out_seq = 0; | |
c86a2930 SW |
338 | if (con->out_msg) { |
339 | ceph_msg_put(con->out_msg); | |
340 | con->out_msg = NULL; | |
341 | } | |
31b8006e | 342 | con->in_seq = 0; |
0e0d5e0c | 343 | con->in_seq_acked = 0; |
31b8006e SW |
344 | } |
345 | ||
346 | /* | |
347 | * mark a peer down. drop any open connections. | |
348 | */ | |
349 | void ceph_con_close(struct ceph_connection *con) | |
350 | { | |
3d14c5d2 YS |
351 | dout("con_close %p peer %s\n", con, |
352 | ceph_pr_addr(&con->peer_addr.in_addr)); | |
31b8006e SW |
353 | set_bit(CLOSED, &con->state); /* in case there's queued work */ |
354 | clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */ | |
1679f876 SW |
355 | clear_bit(LOSSYTX, &con->state); /* so we retry next connect */ |
356 | clear_bit(KEEPALIVE_PENDING, &con->state); | |
357 | clear_bit(WRITE_PENDING, &con->state); | |
ec302645 | 358 | mutex_lock(&con->mutex); |
31b8006e | 359 | reset_connection(con); |
6f2bc3ff | 360 | con->peer_global_seq = 0; |
91e45ce3 | 361 | cancel_delayed_work(&con->work); |
ec302645 | 362 | mutex_unlock(&con->mutex); |
31b8006e SW |
363 | queue_con(con); |
364 | } | |
3d14c5d2 | 365 | EXPORT_SYMBOL(ceph_con_close); |
31b8006e | 366 | |
31b8006e SW |
367 | /* |
368 | * Reopen a closed connection, with a new peer address. | |
369 | */ | |
370 | void ceph_con_open(struct ceph_connection *con, struct ceph_entity_addr *addr) | |
371 | { | |
3d14c5d2 | 372 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
31b8006e SW |
373 | set_bit(OPENING, &con->state); |
374 | clear_bit(CLOSED, &con->state); | |
375 | memcpy(&con->peer_addr, addr, sizeof(*addr)); | |
03c677e1 | 376 | con->delay = 0; /* reset backoff memory */ |
31b8006e SW |
377 | queue_con(con); |
378 | } | |
3d14c5d2 | 379 | EXPORT_SYMBOL(ceph_con_open); |
31b8006e | 380 | |
87b315a5 SW |
381 | /* |
382 | * return true if this connection ever successfully opened | |
383 | */ | |
384 | bool ceph_con_opened(struct ceph_connection *con) | |
385 | { | |
386 | return con->connect_seq > 0; | |
387 | } | |
388 | ||
31b8006e SW |
389 | /* |
390 | * generic get/put | |
391 | */ | |
392 | struct ceph_connection *ceph_con_get(struct ceph_connection *con) | |
393 | { | |
394 | dout("con_get %p nref = %d -> %d\n", con, | |
395 | atomic_read(&con->nref), atomic_read(&con->nref) + 1); | |
396 | if (atomic_inc_not_zero(&con->nref)) | |
397 | return con; | |
398 | return NULL; | |
399 | } | |
400 | ||
401 | void ceph_con_put(struct ceph_connection *con) | |
402 | { | |
403 | dout("con_put %p nref = %d -> %d\n", con, | |
404 | atomic_read(&con->nref), atomic_read(&con->nref) - 1); | |
405 | BUG_ON(atomic_read(&con->nref) == 0); | |
406 | if (atomic_dec_and_test(&con->nref)) { | |
71ececda | 407 | BUG_ON(con->sock); |
31b8006e SW |
408 | kfree(con); |
409 | } | |
410 | } | |
411 | ||
412 | /* | |
413 | * initialize a new connection. | |
414 | */ | |
415 | void ceph_con_init(struct ceph_messenger *msgr, struct ceph_connection *con) | |
416 | { | |
417 | dout("con_init %p\n", con); | |
418 | memset(con, 0, sizeof(*con)); | |
419 | atomic_set(&con->nref, 1); | |
420 | con->msgr = msgr; | |
ec302645 | 421 | mutex_init(&con->mutex); |
31b8006e SW |
422 | INIT_LIST_HEAD(&con->out_queue); |
423 | INIT_LIST_HEAD(&con->out_sent); | |
424 | INIT_DELAYED_WORK(&con->work, con_work); | |
425 | } | |
3d14c5d2 | 426 | EXPORT_SYMBOL(ceph_con_init); |
31b8006e SW |
427 | |
428 | ||
429 | /* | |
430 | * We maintain a global counter to order connection attempts. Get | |
431 | * a unique seq greater than @gt. | |
432 | */ | |
433 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) | |
434 | { | |
435 | u32 ret; | |
436 | ||
437 | spin_lock(&msgr->global_seq_lock); | |
438 | if (msgr->global_seq < gt) | |
439 | msgr->global_seq = gt; | |
440 | ret = ++msgr->global_seq; | |
441 | spin_unlock(&msgr->global_seq_lock); | |
442 | return ret; | |
443 | } | |
444 | ||
445 | ||
446 | /* | |
447 | * Prepare footer for currently outgoing message, and finish things | |
448 | * off. Assumes out_kvec* are already valid.. we just add on to the end. | |
449 | */ | |
450 | static void prepare_write_message_footer(struct ceph_connection *con, int v) | |
451 | { | |
452 | struct ceph_msg *m = con->out_msg; | |
453 | ||
454 | dout("prepare_write_message_footer %p\n", con); | |
455 | con->out_kvec_is_msg = true; | |
456 | con->out_kvec[v].iov_base = &m->footer; | |
457 | con->out_kvec[v].iov_len = sizeof(m->footer); | |
458 | con->out_kvec_bytes += sizeof(m->footer); | |
459 | con->out_kvec_left++; | |
460 | con->out_more = m->more_to_follow; | |
c86a2930 | 461 | con->out_msg_done = true; |
31b8006e SW |
462 | } |
463 | ||
464 | /* | |
465 | * Prepare headers for the next outgoing message. | |
466 | */ | |
467 | static void prepare_write_message(struct ceph_connection *con) | |
468 | { | |
469 | struct ceph_msg *m; | |
470 | int v = 0; | |
471 | ||
472 | con->out_kvec_bytes = 0; | |
473 | con->out_kvec_is_msg = true; | |
c86a2930 | 474 | con->out_msg_done = false; |
31b8006e SW |
475 | |
476 | /* Sneak an ack in there first? If we can get it into the same | |
477 | * TCP packet that's a good thing. */ | |
478 | if (con->in_seq > con->in_seq_acked) { | |
479 | con->in_seq_acked = con->in_seq; | |
480 | con->out_kvec[v].iov_base = &tag_ack; | |
481 | con->out_kvec[v++].iov_len = 1; | |
482 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
483 | con->out_kvec[v].iov_base = &con->out_temp_ack; | |
484 | con->out_kvec[v++].iov_len = sizeof(con->out_temp_ack); | |
485 | con->out_kvec_bytes = 1 + sizeof(con->out_temp_ack); | |
486 | } | |
487 | ||
31b8006e SW |
488 | m = list_first_entry(&con->out_queue, |
489 | struct ceph_msg, list_head); | |
c86a2930 | 490 | con->out_msg = m; |
4cf9d544 SW |
491 | |
492 | /* put message on sent list */ | |
493 | ceph_msg_get(m); | |
494 | list_move_tail(&m->list_head, &con->out_sent); | |
31b8006e | 495 | |
e84346b7 SW |
496 | /* |
497 | * only assign outgoing seq # if we haven't sent this message | |
498 | * yet. if it is requeued, resend with it's original seq. | |
499 | */ | |
500 | if (m->needs_out_seq) { | |
501 | m->hdr.seq = cpu_to_le64(++con->out_seq); | |
502 | m->needs_out_seq = false; | |
503 | } | |
31b8006e SW |
504 | |
505 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", | |
506 | m, con->out_seq, le16_to_cpu(m->hdr.type), | |
507 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), | |
508 | le32_to_cpu(m->hdr.data_len), | |
509 | m->nr_pages); | |
510 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); | |
511 | ||
512 | /* tag + hdr + front + middle */ | |
513 | con->out_kvec[v].iov_base = &tag_msg; | |
514 | con->out_kvec[v++].iov_len = 1; | |
515 | con->out_kvec[v].iov_base = &m->hdr; | |
516 | con->out_kvec[v++].iov_len = sizeof(m->hdr); | |
517 | con->out_kvec[v++] = m->front; | |
518 | if (m->middle) | |
519 | con->out_kvec[v++] = m->middle->vec; | |
520 | con->out_kvec_left = v; | |
521 | con->out_kvec_bytes += 1 + sizeof(m->hdr) + m->front.iov_len + | |
522 | (m->middle ? m->middle->vec.iov_len : 0); | |
523 | con->out_kvec_cur = con->out_kvec; | |
524 | ||
525 | /* fill in crc (except data pages), footer */ | |
526 | con->out_msg->hdr.crc = | |
527 | cpu_to_le32(crc32c(0, (void *)&m->hdr, | |
528 | sizeof(m->hdr) - sizeof(m->hdr.crc))); | |
529 | con->out_msg->footer.flags = CEPH_MSG_FOOTER_COMPLETE; | |
530 | con->out_msg->footer.front_crc = | |
531 | cpu_to_le32(crc32c(0, m->front.iov_base, m->front.iov_len)); | |
532 | if (m->middle) | |
533 | con->out_msg->footer.middle_crc = | |
534 | cpu_to_le32(crc32c(0, m->middle->vec.iov_base, | |
535 | m->middle->vec.iov_len)); | |
536 | else | |
537 | con->out_msg->footer.middle_crc = 0; | |
538 | con->out_msg->footer.data_crc = 0; | |
539 | dout("prepare_write_message front_crc %u data_crc %u\n", | |
540 | le32_to_cpu(con->out_msg->footer.front_crc), | |
541 | le32_to_cpu(con->out_msg->footer.middle_crc)); | |
542 | ||
543 | /* is there a data payload? */ | |
544 | if (le32_to_cpu(m->hdr.data_len) > 0) { | |
545 | /* initialize page iterator */ | |
546 | con->out_msg_pos.page = 0; | |
68b4476b | 547 | if (m->pages) |
c5c6b19d | 548 | con->out_msg_pos.page_pos = m->page_alignment; |
68b4476b YS |
549 | else |
550 | con->out_msg_pos.page_pos = 0; | |
31b8006e SW |
551 | con->out_msg_pos.data_pos = 0; |
552 | con->out_msg_pos.did_page_crc = 0; | |
553 | con->out_more = 1; /* data + footer will follow */ | |
554 | } else { | |
555 | /* no, queue up footer too and be done */ | |
556 | prepare_write_message_footer(con, v); | |
557 | } | |
558 | ||
559 | set_bit(WRITE_PENDING, &con->state); | |
560 | } | |
561 | ||
562 | /* | |
563 | * Prepare an ack. | |
564 | */ | |
565 | static void prepare_write_ack(struct ceph_connection *con) | |
566 | { | |
567 | dout("prepare_write_ack %p %llu -> %llu\n", con, | |
568 | con->in_seq_acked, con->in_seq); | |
569 | con->in_seq_acked = con->in_seq; | |
570 | ||
571 | con->out_kvec[0].iov_base = &tag_ack; | |
572 | con->out_kvec[0].iov_len = 1; | |
573 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); | |
574 | con->out_kvec[1].iov_base = &con->out_temp_ack; | |
575 | con->out_kvec[1].iov_len = sizeof(con->out_temp_ack); | |
576 | con->out_kvec_left = 2; | |
577 | con->out_kvec_bytes = 1 + sizeof(con->out_temp_ack); | |
578 | con->out_kvec_cur = con->out_kvec; | |
579 | con->out_more = 1; /* more will follow.. eventually.. */ | |
580 | set_bit(WRITE_PENDING, &con->state); | |
581 | } | |
582 | ||
583 | /* | |
584 | * Prepare to write keepalive byte. | |
585 | */ | |
586 | static void prepare_write_keepalive(struct ceph_connection *con) | |
587 | { | |
588 | dout("prepare_write_keepalive %p\n", con); | |
589 | con->out_kvec[0].iov_base = &tag_keepalive; | |
590 | con->out_kvec[0].iov_len = 1; | |
591 | con->out_kvec_left = 1; | |
592 | con->out_kvec_bytes = 1; | |
593 | con->out_kvec_cur = con->out_kvec; | |
594 | set_bit(WRITE_PENDING, &con->state); | |
595 | } | |
596 | ||
597 | /* | |
598 | * Connection negotiation. | |
599 | */ | |
600 | ||
0da5d703 | 601 | static int prepare_connect_authorizer(struct ceph_connection *con) |
4e7a5dcd SW |
602 | { |
603 | void *auth_buf; | |
604 | int auth_len = 0; | |
605 | int auth_protocol = 0; | |
606 | ||
ec302645 | 607 | mutex_unlock(&con->mutex); |
4e7a5dcd SW |
608 | if (con->ops->get_authorizer) |
609 | con->ops->get_authorizer(con, &auth_buf, &auth_len, | |
610 | &auth_protocol, &con->auth_reply_buf, | |
611 | &con->auth_reply_buf_len, | |
612 | con->auth_retry); | |
ec302645 | 613 | mutex_lock(&con->mutex); |
4e7a5dcd | 614 | |
0da5d703 SW |
615 | if (test_bit(CLOSED, &con->state) || |
616 | test_bit(OPENING, &con->state)) | |
617 | return -EAGAIN; | |
618 | ||
4e7a5dcd SW |
619 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_protocol); |
620 | con->out_connect.authorizer_len = cpu_to_le32(auth_len); | |
621 | ||
e8f54ce1 SW |
622 | if (auth_len) { |
623 | con->out_kvec[con->out_kvec_left].iov_base = auth_buf; | |
624 | con->out_kvec[con->out_kvec_left].iov_len = auth_len; | |
625 | con->out_kvec_left++; | |
626 | con->out_kvec_bytes += auth_len; | |
627 | } | |
0da5d703 | 628 | return 0; |
4e7a5dcd SW |
629 | } |
630 | ||
31b8006e SW |
631 | /* |
632 | * We connected to a peer and are saying hello. | |
633 | */ | |
eed0ef2c SW |
634 | static void prepare_write_banner(struct ceph_messenger *msgr, |
635 | struct ceph_connection *con) | |
31b8006e SW |
636 | { |
637 | int len = strlen(CEPH_BANNER); | |
eed0ef2c SW |
638 | |
639 | con->out_kvec[0].iov_base = CEPH_BANNER; | |
640 | con->out_kvec[0].iov_len = len; | |
641 | con->out_kvec[1].iov_base = &msgr->my_enc_addr; | |
642 | con->out_kvec[1].iov_len = sizeof(msgr->my_enc_addr); | |
643 | con->out_kvec_left = 2; | |
644 | con->out_kvec_bytes = len + sizeof(msgr->my_enc_addr); | |
645 | con->out_kvec_cur = con->out_kvec; | |
646 | con->out_more = 0; | |
647 | set_bit(WRITE_PENDING, &con->state); | |
648 | } | |
649 | ||
0da5d703 SW |
650 | static int prepare_write_connect(struct ceph_messenger *msgr, |
651 | struct ceph_connection *con, | |
652 | int after_banner) | |
eed0ef2c | 653 | { |
31b8006e SW |
654 | unsigned global_seq = get_global_seq(con->msgr, 0); |
655 | int proto; | |
656 | ||
657 | switch (con->peer_name.type) { | |
658 | case CEPH_ENTITY_TYPE_MON: | |
659 | proto = CEPH_MONC_PROTOCOL; | |
660 | break; | |
661 | case CEPH_ENTITY_TYPE_OSD: | |
662 | proto = CEPH_OSDC_PROTOCOL; | |
663 | break; | |
664 | case CEPH_ENTITY_TYPE_MDS: | |
665 | proto = CEPH_MDSC_PROTOCOL; | |
666 | break; | |
667 | default: | |
668 | BUG(); | |
669 | } | |
670 | ||
671 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, | |
672 | con->connect_seq, global_seq, proto); | |
4e7a5dcd | 673 | |
3d14c5d2 | 674 | con->out_connect.features = cpu_to_le64(msgr->supported_features); |
31b8006e SW |
675 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
676 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); | |
677 | con->out_connect.global_seq = cpu_to_le32(global_seq); | |
678 | con->out_connect.protocol_version = cpu_to_le32(proto); | |
679 | con->out_connect.flags = 0; | |
31b8006e | 680 | |
eed0ef2c SW |
681 | if (!after_banner) { |
682 | con->out_kvec_left = 0; | |
683 | con->out_kvec_bytes = 0; | |
684 | } | |
685 | con->out_kvec[con->out_kvec_left].iov_base = &con->out_connect; | |
686 | con->out_kvec[con->out_kvec_left].iov_len = sizeof(con->out_connect); | |
687 | con->out_kvec_left++; | |
688 | con->out_kvec_bytes += sizeof(con->out_connect); | |
31b8006e SW |
689 | con->out_kvec_cur = con->out_kvec; |
690 | con->out_more = 0; | |
691 | set_bit(WRITE_PENDING, &con->state); | |
4e7a5dcd | 692 | |
0da5d703 | 693 | return prepare_connect_authorizer(con); |
31b8006e SW |
694 | } |
695 | ||
696 | ||
697 | /* | |
698 | * write as much of pending kvecs to the socket as we can. | |
699 | * 1 -> done | |
700 | * 0 -> socket full, but more to do | |
701 | * <0 -> error | |
702 | */ | |
703 | static int write_partial_kvec(struct ceph_connection *con) | |
704 | { | |
705 | int ret; | |
706 | ||
707 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); | |
708 | while (con->out_kvec_bytes > 0) { | |
709 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, | |
710 | con->out_kvec_left, con->out_kvec_bytes, | |
711 | con->out_more); | |
712 | if (ret <= 0) | |
713 | goto out; | |
714 | con->out_kvec_bytes -= ret; | |
715 | if (con->out_kvec_bytes == 0) | |
716 | break; /* done */ | |
717 | while (ret > 0) { | |
718 | if (ret >= con->out_kvec_cur->iov_len) { | |
719 | ret -= con->out_kvec_cur->iov_len; | |
720 | con->out_kvec_cur++; | |
721 | con->out_kvec_left--; | |
722 | } else { | |
723 | con->out_kvec_cur->iov_len -= ret; | |
724 | con->out_kvec_cur->iov_base += ret; | |
725 | ret = 0; | |
726 | break; | |
727 | } | |
728 | } | |
729 | } | |
730 | con->out_kvec_left = 0; | |
731 | con->out_kvec_is_msg = false; | |
732 | ret = 1; | |
733 | out: | |
734 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, | |
735 | con->out_kvec_bytes, con->out_kvec_left, ret); | |
736 | return ret; /* done! */ | |
737 | } | |
738 | ||
68b4476b YS |
739 | #ifdef CONFIG_BLOCK |
740 | static void init_bio_iter(struct bio *bio, struct bio **iter, int *seg) | |
741 | { | |
742 | if (!bio) { | |
743 | *iter = NULL; | |
744 | *seg = 0; | |
745 | return; | |
746 | } | |
747 | *iter = bio; | |
748 | *seg = bio->bi_idx; | |
749 | } | |
750 | ||
751 | static void iter_bio_next(struct bio **bio_iter, int *seg) | |
752 | { | |
753 | if (*bio_iter == NULL) | |
754 | return; | |
755 | ||
756 | BUG_ON(*seg >= (*bio_iter)->bi_vcnt); | |
757 | ||
758 | (*seg)++; | |
759 | if (*seg == (*bio_iter)->bi_vcnt) | |
760 | init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); | |
761 | } | |
762 | #endif | |
763 | ||
31b8006e SW |
764 | /* |
765 | * Write as much message data payload as we can. If we finish, queue | |
766 | * up the footer. | |
767 | * 1 -> done, footer is now queued in out_kvec[]. | |
768 | * 0 -> socket full, but more to do | |
769 | * <0 -> error | |
770 | */ | |
771 | static int write_partial_msg_pages(struct ceph_connection *con) | |
772 | { | |
773 | struct ceph_msg *msg = con->out_msg; | |
774 | unsigned data_len = le32_to_cpu(msg->hdr.data_len); | |
775 | size_t len; | |
776 | int crc = con->msgr->nocrc; | |
777 | int ret; | |
68b4476b YS |
778 | int total_max_write; |
779 | int in_trail = 0; | |
780 | size_t trail_len = (msg->trail ? msg->trail->length : 0); | |
31b8006e SW |
781 | |
782 | dout("write_partial_msg_pages %p msg %p page %d/%d offset %d\n", | |
783 | con, con->out_msg, con->out_msg_pos.page, con->out_msg->nr_pages, | |
784 | con->out_msg_pos.page_pos); | |
785 | ||
68b4476b YS |
786 | #ifdef CONFIG_BLOCK |
787 | if (msg->bio && !msg->bio_iter) | |
788 | init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); | |
789 | #endif | |
790 | ||
791 | while (data_len > con->out_msg_pos.data_pos) { | |
31b8006e SW |
792 | struct page *page = NULL; |
793 | void *kaddr = NULL; | |
68b4476b YS |
794 | int max_write = PAGE_SIZE; |
795 | int page_shift = 0; | |
796 | ||
797 | total_max_write = data_len - trail_len - | |
798 | con->out_msg_pos.data_pos; | |
31b8006e SW |
799 | |
800 | /* | |
801 | * if we are calculating the data crc (the default), we need | |
802 | * to map the page. if our pages[] has been revoked, use the | |
803 | * zero page. | |
804 | */ | |
68b4476b YS |
805 | |
806 | /* have we reached the trail part of the data? */ | |
807 | if (con->out_msg_pos.data_pos >= data_len - trail_len) { | |
808 | in_trail = 1; | |
809 | ||
810 | total_max_write = data_len - con->out_msg_pos.data_pos; | |
811 | ||
812 | page = list_first_entry(&msg->trail->head, | |
813 | struct page, lru); | |
814 | if (crc) | |
815 | kaddr = kmap(page); | |
816 | max_write = PAGE_SIZE; | |
817 | } else if (msg->pages) { | |
31b8006e SW |
818 | page = msg->pages[con->out_msg_pos.page]; |
819 | if (crc) | |
820 | kaddr = kmap(page); | |
58bb3b37 SW |
821 | } else if (msg->pagelist) { |
822 | page = list_first_entry(&msg->pagelist->head, | |
823 | struct page, lru); | |
824 | if (crc) | |
825 | kaddr = kmap(page); | |
68b4476b YS |
826 | #ifdef CONFIG_BLOCK |
827 | } else if (msg->bio) { | |
828 | struct bio_vec *bv; | |
829 | ||
830 | bv = bio_iovec_idx(msg->bio_iter, msg->bio_seg); | |
831 | page = bv->bv_page; | |
832 | page_shift = bv->bv_offset; | |
833 | if (crc) | |
834 | kaddr = kmap(page) + page_shift; | |
835 | max_write = bv->bv_len; | |
836 | #endif | |
31b8006e SW |
837 | } else { |
838 | page = con->msgr->zero_page; | |
839 | if (crc) | |
840 | kaddr = page_address(con->msgr->zero_page); | |
841 | } | |
68b4476b YS |
842 | len = min_t(int, max_write - con->out_msg_pos.page_pos, |
843 | total_max_write); | |
844 | ||
31b8006e SW |
845 | if (crc && !con->out_msg_pos.did_page_crc) { |
846 | void *base = kaddr + con->out_msg_pos.page_pos; | |
847 | u32 tmpcrc = le32_to_cpu(con->out_msg->footer.data_crc); | |
848 | ||
849 | BUG_ON(kaddr == NULL); | |
850 | con->out_msg->footer.data_crc = | |
851 | cpu_to_le32(crc32c(tmpcrc, base, len)); | |
852 | con->out_msg_pos.did_page_crc = 1; | |
853 | } | |
31b8006e | 854 | ret = kernel_sendpage(con->sock, page, |
68b4476b YS |
855 | con->out_msg_pos.page_pos + page_shift, |
856 | len, | |
31b8006e SW |
857 | MSG_DONTWAIT | MSG_NOSIGNAL | |
858 | MSG_MORE); | |
859 | ||
68b4476b YS |
860 | if (crc && |
861 | (msg->pages || msg->pagelist || msg->bio || in_trail)) | |
31b8006e SW |
862 | kunmap(page); |
863 | ||
42961d23 SW |
864 | if (ret == -EAGAIN) |
865 | ret = 0; | |
31b8006e SW |
866 | if (ret <= 0) |
867 | goto out; | |
868 | ||
869 | con->out_msg_pos.data_pos += ret; | |
870 | con->out_msg_pos.page_pos += ret; | |
871 | if (ret == len) { | |
872 | con->out_msg_pos.page_pos = 0; | |
873 | con->out_msg_pos.page++; | |
874 | con->out_msg_pos.did_page_crc = 0; | |
68b4476b YS |
875 | if (in_trail) |
876 | list_move_tail(&page->lru, | |
877 | &msg->trail->head); | |
878 | else if (msg->pagelist) | |
58bb3b37 SW |
879 | list_move_tail(&page->lru, |
880 | &msg->pagelist->head); | |
68b4476b YS |
881 | #ifdef CONFIG_BLOCK |
882 | else if (msg->bio) | |
883 | iter_bio_next(&msg->bio_iter, &msg->bio_seg); | |
884 | #endif | |
31b8006e SW |
885 | } |
886 | } | |
887 | ||
888 | dout("write_partial_msg_pages %p msg %p done\n", con, msg); | |
889 | ||
890 | /* prepare and queue up footer, too */ | |
891 | if (!crc) | |
892 | con->out_msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; | |
893 | con->out_kvec_bytes = 0; | |
894 | con->out_kvec_left = 0; | |
895 | con->out_kvec_cur = con->out_kvec; | |
896 | prepare_write_message_footer(con, 0); | |
897 | ret = 1; | |
898 | out: | |
899 | return ret; | |
900 | } | |
901 | ||
902 | /* | |
903 | * write some zeros | |
904 | */ | |
905 | static int write_partial_skip(struct ceph_connection *con) | |
906 | { | |
907 | int ret; | |
908 | ||
909 | while (con->out_skip > 0) { | |
910 | struct kvec iov = { | |
911 | .iov_base = page_address(con->msgr->zero_page), | |
912 | .iov_len = min(con->out_skip, (int)PAGE_CACHE_SIZE) | |
913 | }; | |
914 | ||
915 | ret = ceph_tcp_sendmsg(con->sock, &iov, 1, iov.iov_len, 1); | |
916 | if (ret <= 0) | |
917 | goto out; | |
918 | con->out_skip -= ret; | |
919 | } | |
920 | ret = 1; | |
921 | out: | |
922 | return ret; | |
923 | } | |
924 | ||
925 | /* | |
926 | * Prepare to read connection handshake, or an ack. | |
927 | */ | |
eed0ef2c SW |
928 | static void prepare_read_banner(struct ceph_connection *con) |
929 | { | |
930 | dout("prepare_read_banner %p\n", con); | |
931 | con->in_base_pos = 0; | |
932 | } | |
933 | ||
31b8006e SW |
934 | static void prepare_read_connect(struct ceph_connection *con) |
935 | { | |
936 | dout("prepare_read_connect %p\n", con); | |
937 | con->in_base_pos = 0; | |
938 | } | |
939 | ||
940 | static void prepare_read_ack(struct ceph_connection *con) | |
941 | { | |
942 | dout("prepare_read_ack %p\n", con); | |
943 | con->in_base_pos = 0; | |
944 | } | |
945 | ||
946 | static void prepare_read_tag(struct ceph_connection *con) | |
947 | { | |
948 | dout("prepare_read_tag %p\n", con); | |
949 | con->in_base_pos = 0; | |
950 | con->in_tag = CEPH_MSGR_TAG_READY; | |
951 | } | |
952 | ||
953 | /* | |
954 | * Prepare to read a message. | |
955 | */ | |
956 | static int prepare_read_message(struct ceph_connection *con) | |
957 | { | |
958 | dout("prepare_read_message %p\n", con); | |
959 | BUG_ON(con->in_msg != NULL); | |
960 | con->in_base_pos = 0; | |
961 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; | |
962 | return 0; | |
963 | } | |
964 | ||
965 | ||
966 | static int read_partial(struct ceph_connection *con, | |
967 | int *to, int size, void *object) | |
968 | { | |
969 | *to += size; | |
970 | while (con->in_base_pos < *to) { | |
971 | int left = *to - con->in_base_pos; | |
972 | int have = size - left; | |
973 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); | |
974 | if (ret <= 0) | |
975 | return ret; | |
976 | con->in_base_pos += ret; | |
977 | } | |
978 | return 1; | |
979 | } | |
980 | ||
981 | ||
982 | /* | |
983 | * Read all or part of the connect-side handshake on a new connection | |
984 | */ | |
eed0ef2c | 985 | static int read_partial_banner(struct ceph_connection *con) |
31b8006e SW |
986 | { |
987 | int ret, to = 0; | |
988 | ||
eed0ef2c | 989 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
31b8006e SW |
990 | |
991 | /* peer's banner */ | |
992 | ret = read_partial(con, &to, strlen(CEPH_BANNER), con->in_banner); | |
993 | if (ret <= 0) | |
994 | goto out; | |
995 | ret = read_partial(con, &to, sizeof(con->actual_peer_addr), | |
996 | &con->actual_peer_addr); | |
997 | if (ret <= 0) | |
998 | goto out; | |
999 | ret = read_partial(con, &to, sizeof(con->peer_addr_for_me), | |
1000 | &con->peer_addr_for_me); | |
1001 | if (ret <= 0) | |
1002 | goto out; | |
eed0ef2c SW |
1003 | out: |
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | static int read_partial_connect(struct ceph_connection *con) | |
1008 | { | |
1009 | int ret, to = 0; | |
1010 | ||
1011 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); | |
1012 | ||
31b8006e SW |
1013 | ret = read_partial(con, &to, sizeof(con->in_reply), &con->in_reply); |
1014 | if (ret <= 0) | |
1015 | goto out; | |
4e7a5dcd SW |
1016 | ret = read_partial(con, &to, le32_to_cpu(con->in_reply.authorizer_len), |
1017 | con->auth_reply_buf); | |
1018 | if (ret <= 0) | |
1019 | goto out; | |
31b8006e | 1020 | |
4e7a5dcd SW |
1021 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
1022 | con, (int)con->in_reply.tag, | |
1023 | le32_to_cpu(con->in_reply.connect_seq), | |
31b8006e SW |
1024 | le32_to_cpu(con->in_reply.global_seq)); |
1025 | out: | |
1026 | return ret; | |
eed0ef2c | 1027 | |
31b8006e SW |
1028 | } |
1029 | ||
1030 | /* | |
1031 | * Verify the hello banner looks okay. | |
1032 | */ | |
1033 | static int verify_hello(struct ceph_connection *con) | |
1034 | { | |
1035 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { | |
13e38c8a | 1036 | pr_err("connect to %s got bad banner\n", |
3d14c5d2 | 1037 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
1038 | con->error_msg = "protocol error, bad banner"; |
1039 | return -1; | |
1040 | } | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | static bool addr_is_blank(struct sockaddr_storage *ss) | |
1045 | { | |
1046 | switch (ss->ss_family) { | |
1047 | case AF_INET: | |
1048 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; | |
1049 | case AF_INET6: | |
1050 | return | |
1051 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && | |
1052 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && | |
1053 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && | |
1054 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; | |
1055 | } | |
1056 | return false; | |
1057 | } | |
1058 | ||
1059 | static int addr_port(struct sockaddr_storage *ss) | |
1060 | { | |
1061 | switch (ss->ss_family) { | |
1062 | case AF_INET: | |
f28bcfbe | 1063 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
31b8006e | 1064 | case AF_INET6: |
f28bcfbe | 1065 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
31b8006e SW |
1066 | } |
1067 | return 0; | |
1068 | } | |
1069 | ||
1070 | static void addr_set_port(struct sockaddr_storage *ss, int p) | |
1071 | { | |
1072 | switch (ss->ss_family) { | |
1073 | case AF_INET: | |
1074 | ((struct sockaddr_in *)ss)->sin_port = htons(p); | |
a2a79609 | 1075 | break; |
31b8006e SW |
1076 | case AF_INET6: |
1077 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); | |
a2a79609 | 1078 | break; |
31b8006e SW |
1079 | } |
1080 | } | |
1081 | ||
ee3b56f2 NW |
1082 | /* |
1083 | * Unlike other *_pton function semantics, zero indicates success. | |
1084 | */ | |
1085 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, | |
1086 | char delim, const char **ipend) | |
1087 | { | |
1088 | struct sockaddr_in *in4 = (void *)ss; | |
1089 | struct sockaddr_in6 *in6 = (void *)ss; | |
1090 | ||
1091 | memset(ss, 0, sizeof(*ss)); | |
1092 | ||
1093 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { | |
1094 | ss->ss_family = AF_INET; | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { | |
1099 | ss->ss_family = AF_INET6; | |
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | return -EINVAL; | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * Extract hostname string and resolve using kernel DNS facility. | |
1108 | */ | |
1109 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER | |
1110 | static int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1111 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1112 | { | |
1113 | const char *end, *delim_p; | |
1114 | char *colon_p, *ip_addr = NULL; | |
1115 | int ip_len, ret; | |
1116 | ||
1117 | /* | |
1118 | * The end of the hostname occurs immediately preceding the delimiter or | |
1119 | * the port marker (':') where the delimiter takes precedence. | |
1120 | */ | |
1121 | delim_p = memchr(name, delim, namelen); | |
1122 | colon_p = memchr(name, ':', namelen); | |
1123 | ||
1124 | if (delim_p && colon_p) | |
1125 | end = delim_p < colon_p ? delim_p : colon_p; | |
1126 | else if (!delim_p && colon_p) | |
1127 | end = colon_p; | |
1128 | else { | |
1129 | end = delim_p; | |
1130 | if (!end) /* case: hostname:/ */ | |
1131 | end = name + namelen; | |
1132 | } | |
1133 | ||
1134 | if (end <= name) | |
1135 | return -EINVAL; | |
1136 | ||
1137 | /* do dns_resolve upcall */ | |
1138 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); | |
1139 | if (ip_len > 0) | |
1140 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); | |
1141 | else | |
1142 | ret = -ESRCH; | |
1143 | ||
1144 | kfree(ip_addr); | |
1145 | ||
1146 | *ipend = end; | |
1147 | ||
1148 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, | |
1149 | ret, ret ? "failed" : ceph_pr_addr(ss)); | |
1150 | ||
1151 | return ret; | |
1152 | } | |
1153 | #else | |
1154 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, | |
1155 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1156 | { | |
1157 | return -EINVAL; | |
1158 | } | |
1159 | #endif | |
1160 | ||
1161 | /* | |
1162 | * Parse a server name (IP or hostname). If a valid IP address is not found | |
1163 | * then try to extract a hostname to resolve using userspace DNS upcall. | |
1164 | */ | |
1165 | static int ceph_parse_server_name(const char *name, size_t namelen, | |
1166 | struct sockaddr_storage *ss, char delim, const char **ipend) | |
1167 | { | |
1168 | int ret; | |
1169 | ||
1170 | ret = ceph_pton(name, namelen, ss, delim, ipend); | |
1171 | if (ret) | |
1172 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); | |
1173 | ||
1174 | return ret; | |
1175 | } | |
1176 | ||
31b8006e SW |
1177 | /* |
1178 | * Parse an ip[:port] list into an addr array. Use the default | |
1179 | * monitor port if a port isn't specified. | |
1180 | */ | |
1181 | int ceph_parse_ips(const char *c, const char *end, | |
1182 | struct ceph_entity_addr *addr, | |
1183 | int max_count, int *count) | |
1184 | { | |
ee3b56f2 | 1185 | int i, ret = -EINVAL; |
31b8006e SW |
1186 | const char *p = c; |
1187 | ||
1188 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); | |
1189 | for (i = 0; i < max_count; i++) { | |
1190 | const char *ipend; | |
1191 | struct sockaddr_storage *ss = &addr[i].in_addr; | |
31b8006e | 1192 | int port; |
39139f64 SW |
1193 | char delim = ','; |
1194 | ||
1195 | if (*p == '[') { | |
1196 | delim = ']'; | |
1197 | p++; | |
1198 | } | |
31b8006e | 1199 | |
ee3b56f2 NW |
1200 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
1201 | if (ret) | |
31b8006e | 1202 | goto bad; |
ee3b56f2 NW |
1203 | ret = -EINVAL; |
1204 | ||
31b8006e SW |
1205 | p = ipend; |
1206 | ||
39139f64 SW |
1207 | if (delim == ']') { |
1208 | if (*p != ']') { | |
1209 | dout("missing matching ']'\n"); | |
1210 | goto bad; | |
1211 | } | |
1212 | p++; | |
1213 | } | |
1214 | ||
31b8006e SW |
1215 | /* port? */ |
1216 | if (p < end && *p == ':') { | |
1217 | port = 0; | |
1218 | p++; | |
1219 | while (p < end && *p >= '0' && *p <= '9') { | |
1220 | port = (port * 10) + (*p - '0'); | |
1221 | p++; | |
1222 | } | |
1223 | if (port > 65535 || port == 0) | |
1224 | goto bad; | |
1225 | } else { | |
1226 | port = CEPH_MON_PORT; | |
1227 | } | |
1228 | ||
1229 | addr_set_port(ss, port); | |
1230 | ||
3d14c5d2 | 1231 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
31b8006e SW |
1232 | |
1233 | if (p == end) | |
1234 | break; | |
1235 | if (*p != ',') | |
1236 | goto bad; | |
1237 | p++; | |
1238 | } | |
1239 | ||
1240 | if (p != end) | |
1241 | goto bad; | |
1242 | ||
1243 | if (count) | |
1244 | *count = i + 1; | |
1245 | return 0; | |
1246 | ||
1247 | bad: | |
39139f64 | 1248 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
ee3b56f2 | 1249 | return ret; |
31b8006e | 1250 | } |
3d14c5d2 | 1251 | EXPORT_SYMBOL(ceph_parse_ips); |
31b8006e | 1252 | |
eed0ef2c | 1253 | static int process_banner(struct ceph_connection *con) |
31b8006e | 1254 | { |
eed0ef2c | 1255 | dout("process_banner on %p\n", con); |
31b8006e SW |
1256 | |
1257 | if (verify_hello(con) < 0) | |
1258 | return -1; | |
1259 | ||
63f2d211 SW |
1260 | ceph_decode_addr(&con->actual_peer_addr); |
1261 | ceph_decode_addr(&con->peer_addr_for_me); | |
1262 | ||
31b8006e SW |
1263 | /* |
1264 | * Make sure the other end is who we wanted. note that the other | |
1265 | * end may not yet know their ip address, so if it's 0.0.0.0, give | |
1266 | * them the benefit of the doubt. | |
1267 | */ | |
103e2d3a SW |
1268 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
1269 | sizeof(con->peer_addr)) != 0 && | |
31b8006e SW |
1270 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
1271 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { | |
cd84db6e | 1272 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
3d14c5d2 | 1273 | ceph_pr_addr(&con->peer_addr.in_addr), |
cd84db6e | 1274 | (int)le32_to_cpu(con->peer_addr.nonce), |
3d14c5d2 | 1275 | ceph_pr_addr(&con->actual_peer_addr.in_addr), |
cd84db6e | 1276 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
58bb3b37 | 1277 | con->error_msg = "wrong peer at address"; |
31b8006e SW |
1278 | return -1; |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * did we learn our address? | |
1283 | */ | |
1284 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { | |
1285 | int port = addr_port(&con->msgr->inst.addr.in_addr); | |
1286 | ||
1287 | memcpy(&con->msgr->inst.addr.in_addr, | |
1288 | &con->peer_addr_for_me.in_addr, | |
1289 | sizeof(con->peer_addr_for_me.in_addr)); | |
1290 | addr_set_port(&con->msgr->inst.addr.in_addr, port); | |
63f2d211 | 1291 | encode_my_addr(con->msgr); |
eed0ef2c | 1292 | dout("process_banner learned my addr is %s\n", |
3d14c5d2 | 1293 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
31b8006e SW |
1294 | } |
1295 | ||
eed0ef2c SW |
1296 | set_bit(NEGOTIATING, &con->state); |
1297 | prepare_read_connect(con); | |
1298 | return 0; | |
1299 | } | |
1300 | ||
04a419f9 SW |
1301 | static void fail_protocol(struct ceph_connection *con) |
1302 | { | |
1303 | reset_connection(con); | |
1304 | set_bit(CLOSED, &con->state); /* in case there's queued work */ | |
1305 | ||
1306 | mutex_unlock(&con->mutex); | |
1307 | if (con->ops->bad_proto) | |
1308 | con->ops->bad_proto(con); | |
1309 | mutex_lock(&con->mutex); | |
1310 | } | |
1311 | ||
eed0ef2c SW |
1312 | static int process_connect(struct ceph_connection *con) |
1313 | { | |
3d14c5d2 YS |
1314 | u64 sup_feat = con->msgr->supported_features; |
1315 | u64 req_feat = con->msgr->required_features; | |
04a419f9 | 1316 | u64 server_feat = le64_to_cpu(con->in_reply.features); |
0da5d703 | 1317 | int ret; |
04a419f9 | 1318 | |
eed0ef2c SW |
1319 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
1320 | ||
31b8006e | 1321 | switch (con->in_reply.tag) { |
04a419f9 SW |
1322 | case CEPH_MSGR_TAG_FEATURES: |
1323 | pr_err("%s%lld %s feature set mismatch," | |
1324 | " my %llx < server's %llx, missing %llx\n", | |
1325 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1326 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1327 | sup_feat, server_feat, server_feat & ~sup_feat); |
1328 | con->error_msg = "missing required protocol features"; | |
1329 | fail_protocol(con); | |
1330 | return -1; | |
1331 | ||
31b8006e | 1332 | case CEPH_MSGR_TAG_BADPROTOVER: |
31b8006e SW |
1333 | pr_err("%s%lld %s protocol version mismatch," |
1334 | " my %d != server's %d\n", | |
1335 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1336 | ceph_pr_addr(&con->peer_addr.in_addr), |
31b8006e SW |
1337 | le32_to_cpu(con->out_connect.protocol_version), |
1338 | le32_to_cpu(con->in_reply.protocol_version)); | |
1339 | con->error_msg = "protocol version mismatch"; | |
04a419f9 | 1340 | fail_protocol(con); |
31b8006e SW |
1341 | return -1; |
1342 | ||
4e7a5dcd SW |
1343 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
1344 | con->auth_retry++; | |
1345 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, | |
1346 | con->auth_retry); | |
1347 | if (con->auth_retry == 2) { | |
1348 | con->error_msg = "connect authorization failure"; | |
4e7a5dcd SW |
1349 | return -1; |
1350 | } | |
1351 | con->auth_retry = 1; | |
0da5d703 SW |
1352 | ret = prepare_write_connect(con->msgr, con, 0); |
1353 | if (ret < 0) | |
1354 | return ret; | |
63733a0f | 1355 | prepare_read_connect(con); |
4e7a5dcd | 1356 | break; |
31b8006e SW |
1357 | |
1358 | case CEPH_MSGR_TAG_RESETSESSION: | |
1359 | /* | |
1360 | * If we connected with a large connect_seq but the peer | |
1361 | * has no record of a session with us (no connection, or | |
1362 | * connect_seq == 0), they will send RESETSESION to indicate | |
1363 | * that they must have reset their session, and may have | |
1364 | * dropped messages. | |
1365 | */ | |
1366 | dout("process_connect got RESET peer seq %u\n", | |
1367 | le32_to_cpu(con->in_connect.connect_seq)); | |
1368 | pr_err("%s%lld %s connection reset\n", | |
1369 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1370 | ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e | 1371 | reset_connection(con); |
eed0ef2c | 1372 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1373 | prepare_read_connect(con); |
1374 | ||
1375 | /* Tell ceph about it. */ | |
ec302645 | 1376 | mutex_unlock(&con->mutex); |
31b8006e SW |
1377 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
1378 | if (con->ops->peer_reset) | |
1379 | con->ops->peer_reset(con); | |
ec302645 | 1380 | mutex_lock(&con->mutex); |
0da5d703 SW |
1381 | if (test_bit(CLOSED, &con->state) || |
1382 | test_bit(OPENING, &con->state)) | |
1383 | return -EAGAIN; | |
31b8006e SW |
1384 | break; |
1385 | ||
1386 | case CEPH_MSGR_TAG_RETRY_SESSION: | |
1387 | /* | |
1388 | * If we sent a smaller connect_seq than the peer has, try | |
1389 | * again with a larger value. | |
1390 | */ | |
1391 | dout("process_connect got RETRY my seq = %u, peer_seq = %u\n", | |
1392 | le32_to_cpu(con->out_connect.connect_seq), | |
1393 | le32_to_cpu(con->in_connect.connect_seq)); | |
1394 | con->connect_seq = le32_to_cpu(con->in_connect.connect_seq); | |
eed0ef2c | 1395 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1396 | prepare_read_connect(con); |
1397 | break; | |
1398 | ||
1399 | case CEPH_MSGR_TAG_RETRY_GLOBAL: | |
1400 | /* | |
1401 | * If we sent a smaller global_seq than the peer has, try | |
1402 | * again with a larger value. | |
1403 | */ | |
eed0ef2c | 1404 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
31b8006e SW |
1405 | con->peer_global_seq, |
1406 | le32_to_cpu(con->in_connect.global_seq)); | |
1407 | get_global_seq(con->msgr, | |
1408 | le32_to_cpu(con->in_connect.global_seq)); | |
eed0ef2c | 1409 | prepare_write_connect(con->msgr, con, 0); |
31b8006e SW |
1410 | prepare_read_connect(con); |
1411 | break; | |
1412 | ||
1413 | case CEPH_MSGR_TAG_READY: | |
04a419f9 SW |
1414 | if (req_feat & ~server_feat) { |
1415 | pr_err("%s%lld %s protocol feature mismatch," | |
1416 | " my required %llx > server's %llx, need %llx\n", | |
1417 | ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 1418 | ceph_pr_addr(&con->peer_addr.in_addr), |
04a419f9 SW |
1419 | req_feat, server_feat, req_feat & ~server_feat); |
1420 | con->error_msg = "missing required protocol features"; | |
1421 | fail_protocol(con); | |
1422 | return -1; | |
1423 | } | |
31b8006e | 1424 | clear_bit(CONNECTING, &con->state); |
31b8006e SW |
1425 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
1426 | con->connect_seq++; | |
aba558e2 | 1427 | con->peer_features = server_feat; |
31b8006e SW |
1428 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
1429 | con->peer_global_seq, | |
1430 | le32_to_cpu(con->in_reply.connect_seq), | |
1431 | con->connect_seq); | |
1432 | WARN_ON(con->connect_seq != | |
1433 | le32_to_cpu(con->in_reply.connect_seq)); | |
92ac41d0 SW |
1434 | |
1435 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) | |
1436 | set_bit(LOSSYTX, &con->state); | |
1437 | ||
31b8006e SW |
1438 | prepare_read_tag(con); |
1439 | break; | |
1440 | ||
1441 | case CEPH_MSGR_TAG_WAIT: | |
1442 | /* | |
1443 | * If there is a connection race (we are opening | |
1444 | * connections to each other), one of us may just have | |
1445 | * to WAIT. This shouldn't happen if we are the | |
1446 | * client. | |
1447 | */ | |
04177882 SW |
1448 | pr_err("process_connect got WAIT as client\n"); |
1449 | con->error_msg = "protocol error, got WAIT as client"; | |
1450 | return -1; | |
31b8006e SW |
1451 | |
1452 | default: | |
1453 | pr_err("connect protocol error, will retry\n"); | |
1454 | con->error_msg = "protocol error, garbage tag during connect"; | |
1455 | return -1; | |
1456 | } | |
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | ||
1461 | /* | |
1462 | * read (part of) an ack | |
1463 | */ | |
1464 | static int read_partial_ack(struct ceph_connection *con) | |
1465 | { | |
1466 | int to = 0; | |
1467 | ||
1468 | return read_partial(con, &to, sizeof(con->in_temp_ack), | |
1469 | &con->in_temp_ack); | |
1470 | } | |
1471 | ||
1472 | ||
1473 | /* | |
1474 | * We can finally discard anything that's been acked. | |
1475 | */ | |
1476 | static void process_ack(struct ceph_connection *con) | |
1477 | { | |
1478 | struct ceph_msg *m; | |
1479 | u64 ack = le64_to_cpu(con->in_temp_ack); | |
1480 | u64 seq; | |
1481 | ||
31b8006e SW |
1482 | while (!list_empty(&con->out_sent)) { |
1483 | m = list_first_entry(&con->out_sent, struct ceph_msg, | |
1484 | list_head); | |
1485 | seq = le64_to_cpu(m->hdr.seq); | |
1486 | if (seq > ack) | |
1487 | break; | |
1488 | dout("got ack for seq %llu type %d at %p\n", seq, | |
1489 | le16_to_cpu(m->hdr.type), m); | |
4cf9d544 | 1490 | m->ack_stamp = jiffies; |
31b8006e SW |
1491 | ceph_msg_remove(m); |
1492 | } | |
31b8006e SW |
1493 | prepare_read_tag(con); |
1494 | } | |
1495 | ||
1496 | ||
1497 | ||
1498 | ||
2450418c | 1499 | static int read_partial_message_section(struct ceph_connection *con, |
213c99ee SW |
1500 | struct kvec *section, |
1501 | unsigned int sec_len, u32 *crc) | |
2450418c | 1502 | { |
68b4476b | 1503 | int ret, left; |
2450418c YS |
1504 | |
1505 | BUG_ON(!section); | |
1506 | ||
1507 | while (section->iov_len < sec_len) { | |
1508 | BUG_ON(section->iov_base == NULL); | |
1509 | left = sec_len - section->iov_len; | |
1510 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + | |
1511 | section->iov_len, left); | |
1512 | if (ret <= 0) | |
1513 | return ret; | |
1514 | section->iov_len += ret; | |
1515 | if (section->iov_len == sec_len) | |
1516 | *crc = crc32c(0, section->iov_base, | |
1517 | section->iov_len); | |
1518 | } | |
31b8006e | 1519 | |
2450418c YS |
1520 | return 1; |
1521 | } | |
31b8006e | 1522 | |
2450418c YS |
1523 | static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, |
1524 | struct ceph_msg_header *hdr, | |
1525 | int *skip); | |
68b4476b YS |
1526 | |
1527 | ||
1528 | static int read_partial_message_pages(struct ceph_connection *con, | |
1529 | struct page **pages, | |
1530 | unsigned data_len, int datacrc) | |
1531 | { | |
1532 | void *p; | |
1533 | int ret; | |
1534 | int left; | |
1535 | ||
1536 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1537 | (int)(PAGE_SIZE - con->in_msg_pos.page_pos)); | |
1538 | /* (page) data */ | |
1539 | BUG_ON(pages == NULL); | |
1540 | p = kmap(pages[con->in_msg_pos.page]); | |
1541 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1542 | left); | |
1543 | if (ret > 0 && datacrc) | |
1544 | con->in_data_crc = | |
1545 | crc32c(con->in_data_crc, | |
1546 | p + con->in_msg_pos.page_pos, ret); | |
1547 | kunmap(pages[con->in_msg_pos.page]); | |
1548 | if (ret <= 0) | |
1549 | return ret; | |
1550 | con->in_msg_pos.data_pos += ret; | |
1551 | con->in_msg_pos.page_pos += ret; | |
1552 | if (con->in_msg_pos.page_pos == PAGE_SIZE) { | |
1553 | con->in_msg_pos.page_pos = 0; | |
1554 | con->in_msg_pos.page++; | |
1555 | } | |
1556 | ||
1557 | return ret; | |
1558 | } | |
1559 | ||
1560 | #ifdef CONFIG_BLOCK | |
1561 | static int read_partial_message_bio(struct ceph_connection *con, | |
1562 | struct bio **bio_iter, int *bio_seg, | |
1563 | unsigned data_len, int datacrc) | |
1564 | { | |
1565 | struct bio_vec *bv = bio_iovec_idx(*bio_iter, *bio_seg); | |
1566 | void *p; | |
1567 | int ret, left; | |
1568 | ||
1569 | if (IS_ERR(bv)) | |
1570 | return PTR_ERR(bv); | |
1571 | ||
1572 | left = min((int)(data_len - con->in_msg_pos.data_pos), | |
1573 | (int)(bv->bv_len - con->in_msg_pos.page_pos)); | |
1574 | ||
1575 | p = kmap(bv->bv_page) + bv->bv_offset; | |
1576 | ||
1577 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, | |
1578 | left); | |
1579 | if (ret > 0 && datacrc) | |
1580 | con->in_data_crc = | |
1581 | crc32c(con->in_data_crc, | |
1582 | p + con->in_msg_pos.page_pos, ret); | |
1583 | kunmap(bv->bv_page); | |
1584 | if (ret <= 0) | |
1585 | return ret; | |
1586 | con->in_msg_pos.data_pos += ret; | |
1587 | con->in_msg_pos.page_pos += ret; | |
1588 | if (con->in_msg_pos.page_pos == bv->bv_len) { | |
1589 | con->in_msg_pos.page_pos = 0; | |
1590 | iter_bio_next(bio_iter, bio_seg); | |
1591 | } | |
1592 | ||
1593 | return ret; | |
1594 | } | |
1595 | #endif | |
1596 | ||
31b8006e SW |
1597 | /* |
1598 | * read (part of) a message. | |
1599 | */ | |
1600 | static int read_partial_message(struct ceph_connection *con) | |
1601 | { | |
1602 | struct ceph_msg *m = con->in_msg; | |
31b8006e | 1603 | int ret; |
9d7f0f13 | 1604 | int to, left; |
c5c6b19d | 1605 | unsigned front_len, middle_len, data_len; |
31b8006e | 1606 | int datacrc = con->msgr->nocrc; |
2450418c | 1607 | int skip; |
ae18756b | 1608 | u64 seq; |
31b8006e SW |
1609 | |
1610 | dout("read_partial_message con %p msg %p\n", con, m); | |
1611 | ||
1612 | /* header */ | |
1613 | while (con->in_base_pos < sizeof(con->in_hdr)) { | |
1614 | left = sizeof(con->in_hdr) - con->in_base_pos; | |
1615 | ret = ceph_tcp_recvmsg(con->sock, | |
1616 | (char *)&con->in_hdr + con->in_base_pos, | |
1617 | left); | |
1618 | if (ret <= 0) | |
1619 | return ret; | |
1620 | con->in_base_pos += ret; | |
1621 | if (con->in_base_pos == sizeof(con->in_hdr)) { | |
1622 | u32 crc = crc32c(0, (void *)&con->in_hdr, | |
1623 | sizeof(con->in_hdr) - sizeof(con->in_hdr.crc)); | |
1624 | if (crc != le32_to_cpu(con->in_hdr.crc)) { | |
1625 | pr_err("read_partial_message bad hdr " | |
1626 | " crc %u != expected %u\n", | |
1627 | crc, con->in_hdr.crc); | |
1628 | return -EBADMSG; | |
1629 | } | |
1630 | } | |
1631 | } | |
31b8006e SW |
1632 | front_len = le32_to_cpu(con->in_hdr.front_len); |
1633 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) | |
1634 | return -EIO; | |
1635 | middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
1636 | if (middle_len > CEPH_MSG_MAX_DATA_LEN) | |
1637 | return -EIO; | |
1638 | data_len = le32_to_cpu(con->in_hdr.data_len); | |
1639 | if (data_len > CEPH_MSG_MAX_DATA_LEN) | |
1640 | return -EIO; | |
1641 | ||
ae18756b SW |
1642 | /* verify seq# */ |
1643 | seq = le64_to_cpu(con->in_hdr.seq); | |
1644 | if ((s64)seq - (s64)con->in_seq < 1) { | |
df9f86fa | 1645 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
ae18756b | 1646 | ENTITY_NAME(con->peer_name), |
3d14c5d2 | 1647 | ceph_pr_addr(&con->peer_addr.in_addr), |
ae18756b SW |
1648 | seq, con->in_seq + 1); |
1649 | con->in_base_pos = -front_len - middle_len - data_len - | |
1650 | sizeof(m->footer); | |
1651 | con->in_tag = CEPH_MSGR_TAG_READY; | |
ae18756b SW |
1652 | return 0; |
1653 | } else if ((s64)seq - (s64)con->in_seq > 1) { | |
1654 | pr_err("read_partial_message bad seq %lld expected %lld\n", | |
1655 | seq, con->in_seq + 1); | |
1656 | con->error_msg = "bad message sequence # for incoming message"; | |
1657 | return -EBADMSG; | |
1658 | } | |
1659 | ||
31b8006e SW |
1660 | /* allocate message? */ |
1661 | if (!con->in_msg) { | |
1662 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, | |
1663 | con->in_hdr.front_len, con->in_hdr.data_len); | |
ae32be31 | 1664 | skip = 0; |
2450418c YS |
1665 | con->in_msg = ceph_alloc_msg(con, &con->in_hdr, &skip); |
1666 | if (skip) { | |
31b8006e | 1667 | /* skip this message */ |
a79832f2 | 1668 | dout("alloc_msg said skip message\n"); |
ae32be31 | 1669 | BUG_ON(con->in_msg); |
31b8006e SW |
1670 | con->in_base_pos = -front_len - middle_len - data_len - |
1671 | sizeof(m->footer); | |
1672 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 1673 | con->in_seq++; |
31b8006e SW |
1674 | return 0; |
1675 | } | |
a79832f2 | 1676 | if (!con->in_msg) { |
5b3a4db3 SW |
1677 | con->error_msg = |
1678 | "error allocating memory for incoming message"; | |
a79832f2 | 1679 | return -ENOMEM; |
31b8006e SW |
1680 | } |
1681 | m = con->in_msg; | |
1682 | m->front.iov_len = 0; /* haven't read it yet */ | |
2450418c YS |
1683 | if (m->middle) |
1684 | m->middle->vec.iov_len = 0; | |
9d7f0f13 YS |
1685 | |
1686 | con->in_msg_pos.page = 0; | |
68b4476b | 1687 | if (m->pages) |
c5c6b19d | 1688 | con->in_msg_pos.page_pos = m->page_alignment; |
68b4476b YS |
1689 | else |
1690 | con->in_msg_pos.page_pos = 0; | |
9d7f0f13 | 1691 | con->in_msg_pos.data_pos = 0; |
31b8006e SW |
1692 | } |
1693 | ||
1694 | /* front */ | |
2450418c YS |
1695 | ret = read_partial_message_section(con, &m->front, front_len, |
1696 | &con->in_front_crc); | |
1697 | if (ret <= 0) | |
1698 | return ret; | |
31b8006e SW |
1699 | |
1700 | /* middle */ | |
2450418c | 1701 | if (m->middle) { |
213c99ee SW |
1702 | ret = read_partial_message_section(con, &m->middle->vec, |
1703 | middle_len, | |
2450418c | 1704 | &con->in_middle_crc); |
31b8006e SW |
1705 | if (ret <= 0) |
1706 | return ret; | |
31b8006e | 1707 | } |
68b4476b YS |
1708 | #ifdef CONFIG_BLOCK |
1709 | if (m->bio && !m->bio_iter) | |
1710 | init_bio_iter(m->bio, &m->bio_iter, &m->bio_seg); | |
1711 | #endif | |
31b8006e SW |
1712 | |
1713 | /* (page) data */ | |
31b8006e | 1714 | while (con->in_msg_pos.data_pos < data_len) { |
68b4476b YS |
1715 | if (m->pages) { |
1716 | ret = read_partial_message_pages(con, m->pages, | |
1717 | data_len, datacrc); | |
1718 | if (ret <= 0) | |
1719 | return ret; | |
1720 | #ifdef CONFIG_BLOCK | |
1721 | } else if (m->bio) { | |
1722 | ||
1723 | ret = read_partial_message_bio(con, | |
1724 | &m->bio_iter, &m->bio_seg, | |
1725 | data_len, datacrc); | |
1726 | if (ret <= 0) | |
1727 | return ret; | |
1728 | #endif | |
1729 | } else { | |
1730 | BUG_ON(1); | |
31b8006e SW |
1731 | } |
1732 | } | |
1733 | ||
31b8006e SW |
1734 | /* footer */ |
1735 | to = sizeof(m->hdr) + sizeof(m->footer); | |
1736 | while (con->in_base_pos < to) { | |
1737 | left = to - con->in_base_pos; | |
1738 | ret = ceph_tcp_recvmsg(con->sock, (char *)&m->footer + | |
1739 | (con->in_base_pos - sizeof(m->hdr)), | |
1740 | left); | |
1741 | if (ret <= 0) | |
1742 | return ret; | |
1743 | con->in_base_pos += ret; | |
1744 | } | |
1745 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", | |
1746 | m, front_len, m->footer.front_crc, middle_len, | |
1747 | m->footer.middle_crc, data_len, m->footer.data_crc); | |
1748 | ||
1749 | /* crc ok? */ | |
1750 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { | |
1751 | pr_err("read_partial_message %p front crc %u != exp. %u\n", | |
1752 | m, con->in_front_crc, m->footer.front_crc); | |
1753 | return -EBADMSG; | |
1754 | } | |
1755 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { | |
1756 | pr_err("read_partial_message %p middle crc %u != exp %u\n", | |
1757 | m, con->in_middle_crc, m->footer.middle_crc); | |
1758 | return -EBADMSG; | |
1759 | } | |
1760 | if (datacrc && | |
1761 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && | |
1762 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { | |
1763 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, | |
1764 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); | |
1765 | return -EBADMSG; | |
1766 | } | |
1767 | ||
1768 | return 1; /* done! */ | |
1769 | } | |
1770 | ||
1771 | /* | |
1772 | * Process message. This happens in the worker thread. The callback should | |
1773 | * be careful not to do anything that waits on other incoming messages or it | |
1774 | * may deadlock. | |
1775 | */ | |
1776 | static void process_message(struct ceph_connection *con) | |
1777 | { | |
5e095e8b | 1778 | struct ceph_msg *msg; |
31b8006e | 1779 | |
5e095e8b | 1780 | msg = con->in_msg; |
31b8006e SW |
1781 | con->in_msg = NULL; |
1782 | ||
1783 | /* if first message, set peer_name */ | |
1784 | if (con->peer_name.type == 0) | |
dbad185d | 1785 | con->peer_name = msg->hdr.src; |
31b8006e | 1786 | |
31b8006e | 1787 | con->in_seq++; |
ec302645 | 1788 | mutex_unlock(&con->mutex); |
31b8006e SW |
1789 | |
1790 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", | |
1791 | msg, le64_to_cpu(msg->hdr.seq), | |
dbad185d | 1792 | ENTITY_NAME(msg->hdr.src), |
31b8006e SW |
1793 | le16_to_cpu(msg->hdr.type), |
1794 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
1795 | le32_to_cpu(msg->hdr.front_len), | |
1796 | le32_to_cpu(msg->hdr.data_len), | |
1797 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); | |
1798 | con->ops->dispatch(con, msg); | |
ec302645 SW |
1799 | |
1800 | mutex_lock(&con->mutex); | |
31b8006e SW |
1801 | prepare_read_tag(con); |
1802 | } | |
1803 | ||
1804 | ||
1805 | /* | |
1806 | * Write something to the socket. Called in a worker thread when the | |
1807 | * socket appears to be writeable and we have something ready to send. | |
1808 | */ | |
1809 | static int try_write(struct ceph_connection *con) | |
1810 | { | |
1811 | struct ceph_messenger *msgr = con->msgr; | |
1812 | int ret = 1; | |
1813 | ||
1814 | dout("try_write start %p state %lu nref %d\n", con, con->state, | |
1815 | atomic_read(&con->nref)); | |
1816 | ||
31b8006e SW |
1817 | more: |
1818 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); | |
1819 | ||
1820 | /* open the socket first? */ | |
1821 | if (con->sock == NULL) { | |
eed0ef2c SW |
1822 | prepare_write_banner(msgr, con); |
1823 | prepare_write_connect(msgr, con, 1); | |
1824 | prepare_read_banner(con); | |
31b8006e | 1825 | set_bit(CONNECTING, &con->state); |
eed0ef2c | 1826 | clear_bit(NEGOTIATING, &con->state); |
31b8006e | 1827 | |
cf3e5c40 | 1828 | BUG_ON(con->in_msg); |
31b8006e SW |
1829 | con->in_tag = CEPH_MSGR_TAG_READY; |
1830 | dout("try_write initiating connect on %p new state %lu\n", | |
1831 | con, con->state); | |
1832 | con->sock = ceph_tcp_connect(con); | |
1833 | if (IS_ERR(con->sock)) { | |
1834 | con->sock = NULL; | |
1835 | con->error_msg = "connect error"; | |
1836 | ret = -1; | |
1837 | goto out; | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | more_kvec: | |
1842 | /* kvec data queued? */ | |
1843 | if (con->out_skip) { | |
1844 | ret = write_partial_skip(con); | |
1845 | if (ret <= 0) | |
42961d23 | 1846 | goto out; |
31b8006e SW |
1847 | } |
1848 | if (con->out_kvec_left) { | |
1849 | ret = write_partial_kvec(con); | |
1850 | if (ret <= 0) | |
42961d23 | 1851 | goto out; |
31b8006e SW |
1852 | } |
1853 | ||
1854 | /* msg pages? */ | |
1855 | if (con->out_msg) { | |
c86a2930 SW |
1856 | if (con->out_msg_done) { |
1857 | ceph_msg_put(con->out_msg); | |
1858 | con->out_msg = NULL; /* we're done with this one */ | |
1859 | goto do_next; | |
1860 | } | |
1861 | ||
31b8006e SW |
1862 | ret = write_partial_msg_pages(con); |
1863 | if (ret == 1) | |
1864 | goto more_kvec; /* we need to send the footer, too! */ | |
1865 | if (ret == 0) | |
42961d23 | 1866 | goto out; |
31b8006e SW |
1867 | if (ret < 0) { |
1868 | dout("try_write write_partial_msg_pages err %d\n", | |
1869 | ret); | |
42961d23 | 1870 | goto out; |
31b8006e SW |
1871 | } |
1872 | } | |
1873 | ||
c86a2930 | 1874 | do_next: |
31b8006e SW |
1875 | if (!test_bit(CONNECTING, &con->state)) { |
1876 | /* is anything else pending? */ | |
1877 | if (!list_empty(&con->out_queue)) { | |
1878 | prepare_write_message(con); | |
1879 | goto more; | |
1880 | } | |
1881 | if (con->in_seq > con->in_seq_acked) { | |
1882 | prepare_write_ack(con); | |
1883 | goto more; | |
1884 | } | |
1885 | if (test_and_clear_bit(KEEPALIVE_PENDING, &con->state)) { | |
1886 | prepare_write_keepalive(con); | |
1887 | goto more; | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | /* Nothing to do! */ | |
1892 | clear_bit(WRITE_PENDING, &con->state); | |
1893 | dout("try_write nothing else to write.\n"); | |
31b8006e SW |
1894 | ret = 0; |
1895 | out: | |
42961d23 | 1896 | dout("try_write done on %p ret %d\n", con, ret); |
31b8006e SW |
1897 | return ret; |
1898 | } | |
1899 | ||
1900 | ||
1901 | ||
1902 | /* | |
1903 | * Read what we can from the socket. | |
1904 | */ | |
1905 | static int try_read(struct ceph_connection *con) | |
1906 | { | |
31b8006e SW |
1907 | int ret = -1; |
1908 | ||
1909 | if (!con->sock) | |
1910 | return 0; | |
1911 | ||
1912 | if (test_bit(STANDBY, &con->state)) | |
1913 | return 0; | |
1914 | ||
1915 | dout("try_read start on %p\n", con); | |
ec302645 | 1916 | |
31b8006e SW |
1917 | more: |
1918 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, | |
1919 | con->in_base_pos); | |
0da5d703 SW |
1920 | |
1921 | /* | |
1922 | * process_connect and process_message drop and re-take | |
1923 | * con->mutex. make sure we handle a racing close or reopen. | |
1924 | */ | |
1925 | if (test_bit(CLOSED, &con->state) || | |
1926 | test_bit(OPENING, &con->state)) { | |
1927 | ret = -EAGAIN; | |
1928 | goto out; | |
1929 | } | |
1930 | ||
31b8006e | 1931 | if (test_bit(CONNECTING, &con->state)) { |
eed0ef2c SW |
1932 | if (!test_bit(NEGOTIATING, &con->state)) { |
1933 | dout("try_read connecting\n"); | |
1934 | ret = read_partial_banner(con); | |
1935 | if (ret <= 0) | |
eed0ef2c | 1936 | goto out; |
98bdb0aa SW |
1937 | ret = process_banner(con); |
1938 | if (ret < 0) | |
1939 | goto out; | |
eed0ef2c | 1940 | } |
31b8006e SW |
1941 | ret = read_partial_connect(con); |
1942 | if (ret <= 0) | |
31b8006e | 1943 | goto out; |
98bdb0aa SW |
1944 | ret = process_connect(con); |
1945 | if (ret < 0) | |
1946 | goto out; | |
31b8006e SW |
1947 | goto more; |
1948 | } | |
1949 | ||
1950 | if (con->in_base_pos < 0) { | |
1951 | /* | |
1952 | * skipping + discarding content. | |
1953 | * | |
1954 | * FIXME: there must be a better way to do this! | |
1955 | */ | |
1956 | static char buf[1024]; | |
1957 | int skip = min(1024, -con->in_base_pos); | |
1958 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); | |
1959 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); | |
1960 | if (ret <= 0) | |
98bdb0aa | 1961 | goto out; |
31b8006e SW |
1962 | con->in_base_pos += ret; |
1963 | if (con->in_base_pos) | |
1964 | goto more; | |
1965 | } | |
1966 | if (con->in_tag == CEPH_MSGR_TAG_READY) { | |
1967 | /* | |
1968 | * what's next? | |
1969 | */ | |
1970 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); | |
1971 | if (ret <= 0) | |
98bdb0aa | 1972 | goto out; |
31b8006e SW |
1973 | dout("try_read got tag %d\n", (int)con->in_tag); |
1974 | switch (con->in_tag) { | |
1975 | case CEPH_MSGR_TAG_MSG: | |
1976 | prepare_read_message(con); | |
1977 | break; | |
1978 | case CEPH_MSGR_TAG_ACK: | |
1979 | prepare_read_ack(con); | |
1980 | break; | |
1981 | case CEPH_MSGR_TAG_CLOSE: | |
1982 | set_bit(CLOSED, &con->state); /* fixme */ | |
98bdb0aa | 1983 | goto out; |
31b8006e SW |
1984 | default: |
1985 | goto bad_tag; | |
1986 | } | |
1987 | } | |
1988 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { | |
1989 | ret = read_partial_message(con); | |
1990 | if (ret <= 0) { | |
1991 | switch (ret) { | |
1992 | case -EBADMSG: | |
1993 | con->error_msg = "bad crc"; | |
1994 | ret = -EIO; | |
98bdb0aa | 1995 | break; |
31b8006e SW |
1996 | case -EIO: |
1997 | con->error_msg = "io error"; | |
98bdb0aa | 1998 | break; |
31b8006e | 1999 | } |
98bdb0aa | 2000 | goto out; |
31b8006e SW |
2001 | } |
2002 | if (con->in_tag == CEPH_MSGR_TAG_READY) | |
2003 | goto more; | |
2004 | process_message(con); | |
2005 | goto more; | |
2006 | } | |
2007 | if (con->in_tag == CEPH_MSGR_TAG_ACK) { | |
2008 | ret = read_partial_ack(con); | |
2009 | if (ret <= 0) | |
98bdb0aa | 2010 | goto out; |
31b8006e SW |
2011 | process_ack(con); |
2012 | goto more; | |
2013 | } | |
2014 | ||
31b8006e | 2015 | out: |
98bdb0aa | 2016 | dout("try_read done on %p ret %d\n", con, ret); |
31b8006e SW |
2017 | return ret; |
2018 | ||
2019 | bad_tag: | |
2020 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); | |
2021 | con->error_msg = "protocol error, garbage tag"; | |
2022 | ret = -1; | |
2023 | goto out; | |
2024 | } | |
2025 | ||
2026 | ||
2027 | /* | |
2028 | * Atomically queue work on a connection. Bump @con reference to | |
2029 | * avoid races with connection teardown. | |
31b8006e SW |
2030 | */ |
2031 | static void queue_con(struct ceph_connection *con) | |
2032 | { | |
2033 | if (test_bit(DEAD, &con->state)) { | |
2034 | dout("queue_con %p ignoring: DEAD\n", | |
2035 | con); | |
2036 | return; | |
2037 | } | |
2038 | ||
2039 | if (!con->ops->get(con)) { | |
2040 | dout("queue_con %p ref count 0\n", con); | |
2041 | return; | |
2042 | } | |
2043 | ||
f363e45f | 2044 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, 0)) { |
31b8006e SW |
2045 | dout("queue_con %p - already queued\n", con); |
2046 | con->ops->put(con); | |
2047 | } else { | |
2048 | dout("queue_con %p\n", con); | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | /* | |
2053 | * Do some work on a connection. Drop a connection ref when we're done. | |
2054 | */ | |
2055 | static void con_work(struct work_struct *work) | |
2056 | { | |
2057 | struct ceph_connection *con = container_of(work, struct ceph_connection, | |
2058 | work.work); | |
0da5d703 | 2059 | int ret; |
31b8006e | 2060 | |
9dd4658d | 2061 | mutex_lock(&con->mutex); |
0da5d703 | 2062 | restart: |
60bf8bf8 SW |
2063 | if (test_and_clear_bit(BACKOFF, &con->state)) { |
2064 | dout("con_work %p backing off\n", con); | |
2065 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
2066 | round_jiffies_relative(con->delay))) { | |
2067 | dout("con_work %p backoff %lu\n", con, con->delay); | |
2068 | mutex_unlock(&con->mutex); | |
2069 | return; | |
2070 | } else { | |
2071 | con->ops->put(con); | |
2072 | dout("con_work %p FAILED to back off %lu\n", con, | |
2073 | con->delay); | |
2074 | } | |
2075 | } | |
9dd4658d | 2076 | |
e00de341 SW |
2077 | if (test_bit(STANDBY, &con->state)) { |
2078 | dout("con_work %p STANDBY\n", con); | |
2079 | goto done; | |
2080 | } | |
31b8006e SW |
2081 | if (test_bit(CLOSED, &con->state)) { /* e.g. if we are replaced */ |
2082 | dout("con_work CLOSED\n"); | |
2083 | con_close_socket(con); | |
2084 | goto done; | |
2085 | } | |
2086 | if (test_and_clear_bit(OPENING, &con->state)) { | |
2087 | /* reopen w/ new peer */ | |
2088 | dout("con_work OPENING\n"); | |
2089 | con_close_socket(con); | |
2090 | } | |
2091 | ||
0da5d703 SW |
2092 | if (test_and_clear_bit(SOCK_CLOSED, &con->state)) |
2093 | goto fault; | |
2094 | ||
2095 | ret = try_read(con); | |
2096 | if (ret == -EAGAIN) | |
2097 | goto restart; | |
2098 | if (ret < 0) | |
2099 | goto fault; | |
2100 | ||
2101 | ret = try_write(con); | |
2102 | if (ret == -EAGAIN) | |
2103 | goto restart; | |
2104 | if (ret < 0) | |
2105 | goto fault; | |
31b8006e SW |
2106 | |
2107 | done: | |
9dd4658d | 2108 | mutex_unlock(&con->mutex); |
9dd4658d | 2109 | done_unlocked: |
31b8006e | 2110 | con->ops->put(con); |
0da5d703 SW |
2111 | return; |
2112 | ||
2113 | fault: | |
2114 | mutex_unlock(&con->mutex); | |
2115 | ceph_fault(con); /* error/fault path */ | |
2116 | goto done_unlocked; | |
31b8006e SW |
2117 | } |
2118 | ||
2119 | ||
2120 | /* | |
2121 | * Generic error/fault handler. A retry mechanism is used with | |
2122 | * exponential backoff | |
2123 | */ | |
2124 | static void ceph_fault(struct ceph_connection *con) | |
2125 | { | |
2126 | pr_err("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), | |
3d14c5d2 | 2127 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); |
31b8006e | 2128 | dout("fault %p state %lu to peer %s\n", |
3d14c5d2 | 2129 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
31b8006e SW |
2130 | |
2131 | if (test_bit(LOSSYTX, &con->state)) { | |
2132 | dout("fault on LOSSYTX channel\n"); | |
2133 | goto out; | |
2134 | } | |
2135 | ||
ec302645 | 2136 | mutex_lock(&con->mutex); |
91e45ce3 SW |
2137 | if (test_bit(CLOSED, &con->state)) |
2138 | goto out_unlock; | |
ec302645 | 2139 | |
31b8006e | 2140 | con_close_socket(con); |
5e095e8b SW |
2141 | |
2142 | if (con->in_msg) { | |
2143 | ceph_msg_put(con->in_msg); | |
2144 | con->in_msg = NULL; | |
2145 | } | |
31b8006e | 2146 | |
e80a52d1 SW |
2147 | /* Requeue anything that hasn't been acked */ |
2148 | list_splice_init(&con->out_sent, &con->out_queue); | |
9bd2e6f8 | 2149 | |
e76661d0 SW |
2150 | /* If there are no messages queued or keepalive pending, place |
2151 | * the connection in a STANDBY state */ | |
2152 | if (list_empty(&con->out_queue) && | |
2153 | !test_bit(KEEPALIVE_PENDING, &con->state)) { | |
e00de341 SW |
2154 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
2155 | clear_bit(WRITE_PENDING, &con->state); | |
31b8006e | 2156 | set_bit(STANDBY, &con->state); |
e80a52d1 SW |
2157 | } else { |
2158 | /* retry after a delay. */ | |
2159 | if (con->delay == 0) | |
2160 | con->delay = BASE_DELAY_INTERVAL; | |
2161 | else if (con->delay < MAX_DELAY_INTERVAL) | |
2162 | con->delay *= 2; | |
e80a52d1 SW |
2163 | con->ops->get(con); |
2164 | if (queue_delayed_work(ceph_msgr_wq, &con->work, | |
60bf8bf8 SW |
2165 | round_jiffies_relative(con->delay))) { |
2166 | dout("fault queued %p delay %lu\n", con, con->delay); | |
2167 | } else { | |
e80a52d1 | 2168 | con->ops->put(con); |
60bf8bf8 SW |
2169 | dout("fault failed to queue %p delay %lu, backoff\n", |
2170 | con, con->delay); | |
2171 | /* | |
2172 | * In many cases we see a socket state change | |
2173 | * while con_work is running and end up | |
2174 | * queuing (non-delayed) work, such that we | |
2175 | * can't backoff with a delay. Set a flag so | |
2176 | * that when con_work restarts we schedule the | |
2177 | * delay then. | |
2178 | */ | |
2179 | set_bit(BACKOFF, &con->state); | |
2180 | } | |
31b8006e SW |
2181 | } |
2182 | ||
91e45ce3 SW |
2183 | out_unlock: |
2184 | mutex_unlock(&con->mutex); | |
31b8006e | 2185 | out: |
161fd65a SW |
2186 | /* |
2187 | * in case we faulted due to authentication, invalidate our | |
2188 | * current tickets so that we can get new ones. | |
213c99ee | 2189 | */ |
161fd65a SW |
2190 | if (con->auth_retry && con->ops->invalidate_authorizer) { |
2191 | dout("calling invalidate_authorizer()\n"); | |
2192 | con->ops->invalidate_authorizer(con); | |
2193 | } | |
2194 | ||
31b8006e SW |
2195 | if (con->ops->fault) |
2196 | con->ops->fault(con); | |
2197 | } | |
2198 | ||
2199 | ||
2200 | ||
2201 | /* | |
2202 | * create a new messenger instance | |
2203 | */ | |
3d14c5d2 YS |
2204 | struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr, |
2205 | u32 supported_features, | |
2206 | u32 required_features) | |
31b8006e SW |
2207 | { |
2208 | struct ceph_messenger *msgr; | |
2209 | ||
2210 | msgr = kzalloc(sizeof(*msgr), GFP_KERNEL); | |
2211 | if (msgr == NULL) | |
2212 | return ERR_PTR(-ENOMEM); | |
2213 | ||
3d14c5d2 YS |
2214 | msgr->supported_features = supported_features; |
2215 | msgr->required_features = required_features; | |
2216 | ||
31b8006e SW |
2217 | spin_lock_init(&msgr->global_seq_lock); |
2218 | ||
2219 | /* the zero page is needed if a request is "canceled" while the message | |
2220 | * is being written over the socket */ | |
31459fe4 | 2221 | msgr->zero_page = __page_cache_alloc(GFP_KERNEL | __GFP_ZERO); |
31b8006e SW |
2222 | if (!msgr->zero_page) { |
2223 | kfree(msgr); | |
2224 | return ERR_PTR(-ENOMEM); | |
2225 | } | |
2226 | kmap(msgr->zero_page); | |
2227 | ||
2228 | if (myaddr) | |
2229 | msgr->inst.addr = *myaddr; | |
2230 | ||
2231 | /* select a random nonce */ | |
ac8839d7 | 2232 | msgr->inst.addr.type = 0; |
103e2d3a | 2233 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
63f2d211 | 2234 | encode_my_addr(msgr); |
31b8006e SW |
2235 | |
2236 | dout("messenger_create %p\n", msgr); | |
2237 | return msgr; | |
2238 | } | |
3d14c5d2 | 2239 | EXPORT_SYMBOL(ceph_messenger_create); |
31b8006e SW |
2240 | |
2241 | void ceph_messenger_destroy(struct ceph_messenger *msgr) | |
2242 | { | |
2243 | dout("destroy %p\n", msgr); | |
2244 | kunmap(msgr->zero_page); | |
2245 | __free_page(msgr->zero_page); | |
2246 | kfree(msgr); | |
2247 | dout("destroyed messenger %p\n", msgr); | |
2248 | } | |
3d14c5d2 | 2249 | EXPORT_SYMBOL(ceph_messenger_destroy); |
31b8006e | 2250 | |
e00de341 SW |
2251 | static void clear_standby(struct ceph_connection *con) |
2252 | { | |
2253 | /* come back from STANDBY? */ | |
2254 | if (test_and_clear_bit(STANDBY, &con->state)) { | |
2255 | mutex_lock(&con->mutex); | |
2256 | dout("clear_standby %p and ++connect_seq\n", con); | |
2257 | con->connect_seq++; | |
2258 | WARN_ON(test_bit(WRITE_PENDING, &con->state)); | |
2259 | WARN_ON(test_bit(KEEPALIVE_PENDING, &con->state)); | |
2260 | mutex_unlock(&con->mutex); | |
2261 | } | |
2262 | } | |
2263 | ||
31b8006e SW |
2264 | /* |
2265 | * Queue up an outgoing message on the given connection. | |
2266 | */ | |
2267 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) | |
2268 | { | |
2269 | if (test_bit(CLOSED, &con->state)) { | |
2270 | dout("con_send %p closed, dropping %p\n", con, msg); | |
2271 | ceph_msg_put(msg); | |
2272 | return; | |
2273 | } | |
2274 | ||
2275 | /* set src+dst */ | |
dbad185d | 2276 | msg->hdr.src = con->msgr->inst.name; |
31b8006e | 2277 | |
3ca02ef9 SW |
2278 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
2279 | ||
e84346b7 SW |
2280 | msg->needs_out_seq = true; |
2281 | ||
31b8006e | 2282 | /* queue */ |
ec302645 | 2283 | mutex_lock(&con->mutex); |
31b8006e SW |
2284 | BUG_ON(!list_empty(&msg->list_head)); |
2285 | list_add_tail(&msg->list_head, &con->out_queue); | |
2286 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, | |
2287 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), | |
2288 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), | |
2289 | le32_to_cpu(msg->hdr.front_len), | |
2290 | le32_to_cpu(msg->hdr.middle_len), | |
2291 | le32_to_cpu(msg->hdr.data_len)); | |
ec302645 | 2292 | mutex_unlock(&con->mutex); |
31b8006e SW |
2293 | |
2294 | /* if there wasn't anything waiting to send before, queue | |
2295 | * new work */ | |
e00de341 | 2296 | clear_standby(con); |
31b8006e SW |
2297 | if (test_and_set_bit(WRITE_PENDING, &con->state) == 0) |
2298 | queue_con(con); | |
2299 | } | |
3d14c5d2 | 2300 | EXPORT_SYMBOL(ceph_con_send); |
31b8006e SW |
2301 | |
2302 | /* | |
2303 | * Revoke a message that was previously queued for send | |
2304 | */ | |
2305 | void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg) | |
2306 | { | |
ec302645 | 2307 | mutex_lock(&con->mutex); |
31b8006e | 2308 | if (!list_empty(&msg->list_head)) { |
ed98adad | 2309 | dout("con_revoke %p msg %p - was on queue\n", con, msg); |
31b8006e SW |
2310 | list_del_init(&msg->list_head); |
2311 | ceph_msg_put(msg); | |
2312 | msg->hdr.seq = 0; | |
ed98adad SW |
2313 | } |
2314 | if (con->out_msg == msg) { | |
2315 | dout("con_revoke %p msg %p - was sending\n", con, msg); | |
2316 | con->out_msg = NULL; | |
31b8006e SW |
2317 | if (con->out_kvec_is_msg) { |
2318 | con->out_skip = con->out_kvec_bytes; | |
2319 | con->out_kvec_is_msg = false; | |
2320 | } | |
ed98adad SW |
2321 | ceph_msg_put(msg); |
2322 | msg->hdr.seq = 0; | |
31b8006e | 2323 | } |
ec302645 | 2324 | mutex_unlock(&con->mutex); |
31b8006e SW |
2325 | } |
2326 | ||
350b1c32 | 2327 | /* |
0d59ab81 | 2328 | * Revoke a message that we may be reading data into |
350b1c32 | 2329 | */ |
0d59ab81 | 2330 | void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg) |
350b1c32 SW |
2331 | { |
2332 | mutex_lock(&con->mutex); | |
0d59ab81 YS |
2333 | if (con->in_msg && con->in_msg == msg) { |
2334 | unsigned front_len = le32_to_cpu(con->in_hdr.front_len); | |
2335 | unsigned middle_len = le32_to_cpu(con->in_hdr.middle_len); | |
350b1c32 SW |
2336 | unsigned data_len = le32_to_cpu(con->in_hdr.data_len); |
2337 | ||
2338 | /* skip rest of message */ | |
0d59ab81 | 2339 | dout("con_revoke_pages %p msg %p revoked\n", con, msg); |
350b1c32 SW |
2340 | con->in_base_pos = con->in_base_pos - |
2341 | sizeof(struct ceph_msg_header) - | |
0d59ab81 YS |
2342 | front_len - |
2343 | middle_len - | |
2344 | data_len - | |
350b1c32 | 2345 | sizeof(struct ceph_msg_footer); |
350b1c32 SW |
2346 | ceph_msg_put(con->in_msg); |
2347 | con->in_msg = NULL; | |
2348 | con->in_tag = CEPH_MSGR_TAG_READY; | |
684be25c | 2349 | con->in_seq++; |
350b1c32 SW |
2350 | } else { |
2351 | dout("con_revoke_pages %p msg %p pages %p no-op\n", | |
0d59ab81 | 2352 | con, con->in_msg, msg); |
350b1c32 SW |
2353 | } |
2354 | mutex_unlock(&con->mutex); | |
2355 | } | |
2356 | ||
31b8006e SW |
2357 | /* |
2358 | * Queue a keepalive byte to ensure the tcp connection is alive. | |
2359 | */ | |
2360 | void ceph_con_keepalive(struct ceph_connection *con) | |
2361 | { | |
e00de341 SW |
2362 | dout("con_keepalive %p\n", con); |
2363 | clear_standby(con); | |
31b8006e SW |
2364 | if (test_and_set_bit(KEEPALIVE_PENDING, &con->state) == 0 && |
2365 | test_and_set_bit(WRITE_PENDING, &con->state) == 0) | |
2366 | queue_con(con); | |
2367 | } | |
3d14c5d2 | 2368 | EXPORT_SYMBOL(ceph_con_keepalive); |
31b8006e SW |
2369 | |
2370 | ||
2371 | /* | |
2372 | * construct a new message with given type, size | |
2373 | * the new msg has a ref count of 1. | |
2374 | */ | |
b61c2763 SW |
2375 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
2376 | bool can_fail) | |
31b8006e SW |
2377 | { |
2378 | struct ceph_msg *m; | |
2379 | ||
34d23762 | 2380 | m = kmalloc(sizeof(*m), flags); |
31b8006e SW |
2381 | if (m == NULL) |
2382 | goto out; | |
c2e552e7 | 2383 | kref_init(&m->kref); |
31b8006e SW |
2384 | INIT_LIST_HEAD(&m->list_head); |
2385 | ||
45c6ceb5 | 2386 | m->hdr.tid = 0; |
31b8006e | 2387 | m->hdr.type = cpu_to_le16(type); |
45c6ceb5 SW |
2388 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
2389 | m->hdr.version = 0; | |
31b8006e SW |
2390 | m->hdr.front_len = cpu_to_le32(front_len); |
2391 | m->hdr.middle_len = 0; | |
bb257664 SW |
2392 | m->hdr.data_len = 0; |
2393 | m->hdr.data_off = 0; | |
45c6ceb5 | 2394 | m->hdr.reserved = 0; |
31b8006e SW |
2395 | m->footer.front_crc = 0; |
2396 | m->footer.middle_crc = 0; | |
2397 | m->footer.data_crc = 0; | |
45c6ceb5 | 2398 | m->footer.flags = 0; |
31b8006e SW |
2399 | m->front_max = front_len; |
2400 | m->front_is_vmalloc = false; | |
2401 | m->more_to_follow = false; | |
c0d5f9db | 2402 | m->ack_stamp = 0; |
31b8006e SW |
2403 | m->pool = NULL; |
2404 | ||
ca20892d HC |
2405 | /* middle */ |
2406 | m->middle = NULL; | |
2407 | ||
2408 | /* data */ | |
2409 | m->nr_pages = 0; | |
2410 | m->page_alignment = 0; | |
2411 | m->pages = NULL; | |
2412 | m->pagelist = NULL; | |
2413 | m->bio = NULL; | |
2414 | m->bio_iter = NULL; | |
2415 | m->bio_seg = 0; | |
2416 | m->trail = NULL; | |
2417 | ||
31b8006e SW |
2418 | /* front */ |
2419 | if (front_len) { | |
2420 | if (front_len > PAGE_CACHE_SIZE) { | |
34d23762 | 2421 | m->front.iov_base = __vmalloc(front_len, flags, |
31b8006e SW |
2422 | PAGE_KERNEL); |
2423 | m->front_is_vmalloc = true; | |
2424 | } else { | |
34d23762 | 2425 | m->front.iov_base = kmalloc(front_len, flags); |
31b8006e SW |
2426 | } |
2427 | if (m->front.iov_base == NULL) { | |
b61c2763 | 2428 | dout("ceph_msg_new can't allocate %d bytes\n", |
31b8006e SW |
2429 | front_len); |
2430 | goto out2; | |
2431 | } | |
2432 | } else { | |
2433 | m->front.iov_base = NULL; | |
2434 | } | |
2435 | m->front.iov_len = front_len; | |
2436 | ||
bb257664 | 2437 | dout("ceph_msg_new %p front %d\n", m, front_len); |
31b8006e SW |
2438 | return m; |
2439 | ||
2440 | out2: | |
2441 | ceph_msg_put(m); | |
2442 | out: | |
b61c2763 SW |
2443 | if (!can_fail) { |
2444 | pr_err("msg_new can't create type %d front %d\n", type, | |
2445 | front_len); | |
f0ed1b7c | 2446 | WARN_ON(1); |
b61c2763 SW |
2447 | } else { |
2448 | dout("msg_new can't create type %d front %d\n", type, | |
2449 | front_len); | |
2450 | } | |
a79832f2 | 2451 | return NULL; |
31b8006e | 2452 | } |
3d14c5d2 | 2453 | EXPORT_SYMBOL(ceph_msg_new); |
31b8006e | 2454 | |
31b8006e SW |
2455 | /* |
2456 | * Allocate "middle" portion of a message, if it is needed and wasn't | |
2457 | * allocated by alloc_msg. This allows us to read a small fixed-size | |
2458 | * per-type header in the front and then gracefully fail (i.e., | |
2459 | * propagate the error to the caller based on info in the front) when | |
2460 | * the middle is too large. | |
2461 | */ | |
2450418c | 2462 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
31b8006e SW |
2463 | { |
2464 | int type = le16_to_cpu(msg->hdr.type); | |
2465 | int middle_len = le32_to_cpu(msg->hdr.middle_len); | |
2466 | ||
2467 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, | |
2468 | ceph_msg_type_name(type), middle_len); | |
2469 | BUG_ON(!middle_len); | |
2470 | BUG_ON(msg->middle); | |
2471 | ||
b6c1d5b8 | 2472 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
31b8006e SW |
2473 | if (!msg->middle) |
2474 | return -ENOMEM; | |
2475 | return 0; | |
2476 | } | |
2477 | ||
2450418c YS |
2478 | /* |
2479 | * Generic message allocator, for incoming messages. | |
2480 | */ | |
2481 | static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, | |
2482 | struct ceph_msg_header *hdr, | |
2483 | int *skip) | |
2484 | { | |
2485 | int type = le16_to_cpu(hdr->type); | |
2486 | int front_len = le32_to_cpu(hdr->front_len); | |
2487 | int middle_len = le32_to_cpu(hdr->middle_len); | |
2488 | struct ceph_msg *msg = NULL; | |
2489 | int ret; | |
2490 | ||
2491 | if (con->ops->alloc_msg) { | |
0547a9b3 | 2492 | mutex_unlock(&con->mutex); |
2450418c | 2493 | msg = con->ops->alloc_msg(con, hdr, skip); |
0547a9b3 | 2494 | mutex_lock(&con->mutex); |
a79832f2 | 2495 | if (!msg || *skip) |
2450418c YS |
2496 | return NULL; |
2497 | } | |
2498 | if (!msg) { | |
2499 | *skip = 0; | |
b61c2763 | 2500 | msg = ceph_msg_new(type, front_len, GFP_NOFS, false); |
2450418c YS |
2501 | if (!msg) { |
2502 | pr_err("unable to allocate msg type %d len %d\n", | |
2503 | type, front_len); | |
a79832f2 | 2504 | return NULL; |
2450418c | 2505 | } |
c5c6b19d | 2506 | msg->page_alignment = le16_to_cpu(hdr->data_off); |
2450418c | 2507 | } |
9d7f0f13 | 2508 | memcpy(&msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
2450418c | 2509 | |
bb257664 | 2510 | if (middle_len && !msg->middle) { |
2450418c | 2511 | ret = ceph_alloc_middle(con, msg); |
2450418c YS |
2512 | if (ret < 0) { |
2513 | ceph_msg_put(msg); | |
a79832f2 | 2514 | return NULL; |
2450418c YS |
2515 | } |
2516 | } | |
9d7f0f13 | 2517 | |
2450418c YS |
2518 | return msg; |
2519 | } | |
2520 | ||
31b8006e SW |
2521 | |
2522 | /* | |
2523 | * Free a generically kmalloc'd message. | |
2524 | */ | |
2525 | void ceph_msg_kfree(struct ceph_msg *m) | |
2526 | { | |
2527 | dout("msg_kfree %p\n", m); | |
2528 | if (m->front_is_vmalloc) | |
2529 | vfree(m->front.iov_base); | |
2530 | else | |
2531 | kfree(m->front.iov_base); | |
2532 | kfree(m); | |
2533 | } | |
2534 | ||
2535 | /* | |
2536 | * Drop a msg ref. Destroy as needed. | |
2537 | */ | |
c2e552e7 SW |
2538 | void ceph_msg_last_put(struct kref *kref) |
2539 | { | |
2540 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); | |
31b8006e | 2541 | |
c2e552e7 SW |
2542 | dout("ceph_msg_put last one on %p\n", m); |
2543 | WARN_ON(!list_empty(&m->list_head)); | |
2544 | ||
2545 | /* drop middle, data, if any */ | |
2546 | if (m->middle) { | |
2547 | ceph_buffer_put(m->middle); | |
2548 | m->middle = NULL; | |
31b8006e | 2549 | } |
c2e552e7 SW |
2550 | m->nr_pages = 0; |
2551 | m->pages = NULL; | |
2552 | ||
58bb3b37 SW |
2553 | if (m->pagelist) { |
2554 | ceph_pagelist_release(m->pagelist); | |
2555 | kfree(m->pagelist); | |
2556 | m->pagelist = NULL; | |
2557 | } | |
2558 | ||
68b4476b YS |
2559 | m->trail = NULL; |
2560 | ||
c2e552e7 SW |
2561 | if (m->pool) |
2562 | ceph_msgpool_put(m->pool, m); | |
2563 | else | |
2564 | ceph_msg_kfree(m); | |
31b8006e | 2565 | } |
3d14c5d2 | 2566 | EXPORT_SYMBOL(ceph_msg_last_put); |
9ec7cab1 SW |
2567 | |
2568 | void ceph_msg_dump(struct ceph_msg *msg) | |
2569 | { | |
2570 | pr_debug("msg_dump %p (front_max %d nr_pages %d)\n", msg, | |
2571 | msg->front_max, msg->nr_pages); | |
2572 | print_hex_dump(KERN_DEBUG, "header: ", | |
2573 | DUMP_PREFIX_OFFSET, 16, 1, | |
2574 | &msg->hdr, sizeof(msg->hdr), true); | |
2575 | print_hex_dump(KERN_DEBUG, " front: ", | |
2576 | DUMP_PREFIX_OFFSET, 16, 1, | |
2577 | msg->front.iov_base, msg->front.iov_len, true); | |
2578 | if (msg->middle) | |
2579 | print_hex_dump(KERN_DEBUG, "middle: ", | |
2580 | DUMP_PREFIX_OFFSET, 16, 1, | |
2581 | msg->middle->vec.iov_base, | |
2582 | msg->middle->vec.iov_len, true); | |
2583 | print_hex_dump(KERN_DEBUG, "footer: ", | |
2584 | DUMP_PREFIX_OFFSET, 16, 1, | |
2585 | &msg->footer, sizeof(msg->footer), true); | |
2586 | } | |
3d14c5d2 | 2587 | EXPORT_SYMBOL(ceph_msg_dump); |